Suwanosejima

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 29.638°N
  • 129.714°E

  • 796 m
    2611 ft

  • 282030
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

19 February-25 February 2014

The Tokyo VAAC reported an explosion from Suwanosejima on 19 February. Explosions during 23-24 February produced plumes that rose to an altitude of 1.8 km (6,000 ft) a.s.l. An ash plume on 24 February drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)



 Available Weekly Reports


2014: January | February
2013: July | August | September | October | November | December
2012: January | February | October
2011: January | February | March | April | July | September | October
2010: January | February | March | April | May | July | August | September | October | November | December
2009: January | February | March | April | May | June | July | August | September | October | November | December
2008: February | March | April | June | July | August | September | October | November | December
2007: January | February | March | May | July | September | October | November | December
2006: January | February | March | April | June | July | August | September | October | November | December
2005: March | April | May | June | July | August | September
2004: January | April | June | November | December
2003: December
2002: June | August | September
2001: January | May | July | October


19 February-25 February 2014

The Tokyo VAAC reported an explosion from Suwanosejima on 19 February. Explosions during 23-24 February produced plumes that rose to an altitude of 1.8 km (6,000 ft) a.s.l. An ash plume on 24 February drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 February-18 February 2014

The Tokyo VAAC reported explosions from Suwanosejima during 12-14 February. On 12 February a plume rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted SE, and on 14 February a plume rose to an altitude of 1.8 km (6,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


29 January-4 February 2014

Based on JMA notices and pilot observations, the Tokyo VAAC reported that on 2 February ash plumes from Suwanosejima rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. and drifted SE and SSE.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


22 January-28 January 2014

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanosejima on 24 January generated a plume that rose to an altitude 1.8 km (6,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


8 January-14 January 2014

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanosejima during 8-9 January sometimes generated plumes that rose to an altitude 1.2 km (4,000 ft) a.s.l. and drifted NE and SE.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 January-7 January 2014

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 1-3 and 6 January. Explosions during 1-2 January generated plumes that rose to altitudes 0.9-1.8 km (3,000-6,000 ft) a.s.l. and drifted SE. JMA noted that the Alert Level remained at 2 (on a scale of 1-5).

Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)


25 December-31 December 2013

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 26-30 December. Explosions during 27-28 December generated plumes that rose to an altitude over 1.5 km (5,000 ft) a.s.l. and drifted SE.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


27 November-3 December 2013

Based on information from JMA, the Tokyo VAAC reported that an explosion from Suwanose-jima on 27 November generated a plume that rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


16 October-22 October 2013

According to the Tokyo VAAC, a pilot observed an ash plume from Suwanose-jima on 21 October. Based on information from JMA the VAAC noted that a plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted S that same day.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


11 September-17 September 2013

According to the Tokyo VAAC, the JMA reported that on 12 September an eruption from Suwanose-jima generated an ash plume that rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted NW.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


4 September-10 September 2013

According to the Tokyo VAAC, the JMA reported that during 5-6 September explosions from Suwanose-jima generated ash plumes that rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted NW and N.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


28 August-3 September 2013

According to the Tokyo VAAC, the JMA reported that on 28 August pilots observed ash plumes from Suwanose-jima that rose to altitudes of 3-3.7 km (10,000-12,000 ft) a.s.l. and drifted E and NW. Explosions during 28-29 August generated ash plumes that rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted NE. Ash was detected in satellite images on 29 August, and explosions were detected on 30 August and 1 September.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


21 August-27 August 2013

According to the Tokyo VAAC, the JMA reported explosions from Suwanose-jima during 26-27 August. Plumes rose to an altitude of 1.2 km (4,000 ft) a.s.l. on 27 August, and drifted NE and SE.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


3 July-9 July 2013

According to the Tokyo VAAC, a pilot observed an ash plume from Suwanose-jima that rose to an altitude of 1.5 km (5,000 ft) a.s.l. Ash was not detected in satellite images.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


3 October-9 October 2012

Based on a pilot observation, the Tokyo VAAC reported that on 3 October an ash plume from Suwanose-jima drifted SW at altitude of 3 km (10,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


29 February-6 March 2012

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 6 March. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 February-7 February 2012

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 6 February. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


11 January-17 January 2012

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 12 January. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


19 October-25 October 2011

Based on a pilot observation, the Tokyo VAAC reported that on 14 October an ash plume from Suwanose-jima rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted SE. Ash was not detected in satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


7 September-13 September 2011

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 12 September. That same day an eruption produced a plume that rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted W.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


13 July-19 July 2011

Based on a pilot observation, the Tokyo VAAC reported that on 14 July an ash plume from Suwanose-jima rose to an altitude of 3.7 km (12,000 ft) a.s.l. Ash was not detected in satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


27 April-3 May 2011

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 3 May. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


6 April-12 April 2011

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanose-jima on 12 April produced a plume that rose to an altitude of 1.8 km (6,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


16 March-22 March 2011

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 19-20 March. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


9 March-15 March 2011

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 15 March. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


2 March-8 March 2011

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 3 March. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


9 February-15 February 2011

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 9 and 14 February. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


2 February-8 February 2011

Based on a pilot observation, the Tokyo VAAC reported that on 5 February an ash plume from Suwanose-jima rose to an altitude of 0.7 km (2,000 ft) a.s.l. and drifted S. Explosions during 5-7 February were noted by JMA.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


19 January-25 January 2011

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 22-23 and 25 January. A plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted S on 23 January.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 January-18 January 2011

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 12-13 and 15 January. A plume rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted SE on 13 January.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


5 January-11 January 2011

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima during 11-12 January. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


29 December-4 January 2011

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 29 December. Details of a possible resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


15 December-21 December 2010

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 20 December. Details of possible a resulting plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 December-7 December 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 1-4 December. Plumes rose to an altitude of 1.2 km (4,000 ft) and drifted SE on 4 December.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


24 November-30 November 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 27 November-1 December. Plumes rose to a maximum altitude of 1.5 km (5,000 ft) on 29 November.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


17 November-23 November 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 18-23 November. Plumes rose to an altitude of 1.8 km (6,000 ft) on 18 November and to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted NE on 21 November.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


10 November-16 November 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 10 and 12 November. On 11 November a pilot reported an ash plume. A subsequent satellite image showed that the ash had dissipated. The next day, a pilot reported that an ash plume rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted S.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


20 October-26 October 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 26 October.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


13 October-19 October 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 16-17 October. A plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted SE on 17 October.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


29 September-5 October 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 3-5 October. A plume drifted E on 5 October.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


22 September-28 September 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 22, 25, and 27-28 September. A pilot observed an ash plume on 22 September that rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted SE. JMA noted that plumes on 25 September rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


15 September-21 September 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 19-21 September. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


8 September-14 September 2010

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 11 September. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


25 August-31 August 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 25 and 27 August. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


18 August-24 August 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 21-24 August. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


21 July-27 July 2010

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanose-jima produced plumes that rose to an altitude of 1.5 km (5,000 ft) a.s.l. on 23 July and to an altitude of 2.4 km (8,000 ft) a.s.l. on 26 July. Plumes drifted NW and W, respectively.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


14 July-20 July 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 17 and 19 July. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 May-18 May 2010

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanose-jima during 15-16 May produced plumes that rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted N and NW.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


28 April-4 May 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 29 April, and during 1 and 4-5 May. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


31 March-6 April 2010

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 2 April. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


24 March-30 March 2010

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 29 March. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


17 February-23 February 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 17-19 and 21-22 February. Plumes occasionally rose to altitudes of 1.2-1.8 km (4,000-6,000 ft) a.s.l. and drifted E and SE.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


10 February-16 February 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 11-16 February. Details of possible resulting plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


3 February-9 February 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 5-6 and 9 February. Details of possible resulting emissions were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


27 January-2 February 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 27 January-2 February. On 27 January, plumes rose to altitudes of 1.2-1.5 km (4,000-5,000 ft) a.s.l. and drifted W. Plumes rose to an altitude of 1.8 km (6,000 ft) a.s.l. on 29 January.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


20 January-26 January 2010

During 29-30 December 2009, a visitor to Suwanose-jima observed and photographed multiple Strombolian explosions and ash eruptions from On-take (Otake) crater. Based on information from JMA, the Tokyo VAAC reported explosions during 22-26 January. On 24 and 26 January, plumes rose to altitudes of 1.2-1.5 km (4,000-5,000 ft) a.s.l.

Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Richard Roscoe, Photo Volcanica


13 January-19 January 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 13 and 16-17 January. Details of possible resulting emissions were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


6 January-12 January 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 6-9 and 11 January. Plumes rose to an altitude of 1.8 km (6,000 ft) a.s.l. on 6 and 9 January and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


30 December-5 January 2010

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 30 December-2 January and 4-5 January. Plumes rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. on 2 and 4 January, and drifted NE and E on 4 January.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


23 December-29 December 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 24, 26, and 28-29 December. Details of possible resulting emissions were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


16 December-22 December 2009

Based on information from JMA, the Tokyo VAAC reported eruptions from Suwanose-jima during 17-20 and 22 December. A plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. on 22 December.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


9 December-15 December 2009

Based on information from JMA, the Tokyo VAAC reported eruptions from Suwanose-jima on 14 and 15 December. Plumes rose to altitudes of 1.2-1.5 km (4,000-5,000 ft) a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


2 December-8 December 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima during 5-6 December. Details of possible resulting emissions were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


25 November-1 December 2009

The Tokyo VAAC reported that on 26 November an ash plume from Suwanose-jima was seen by a pilot 65 km S drifting NE at an altitude of 3 km (10,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


18 November-24 November 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 18 November. Details of possible resulting emissions were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


11 November-17 November 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 12 and 16 November. Details of possible resulting emissions were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


4 November-10 November 2009

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanose-jima during 4-5 November produced plumes that rose to altitudes of 1.2-1.8 km (4,000-6,000 ft) a.s.l. and drifted SW and W. An explosion was also reported on 6 November.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


28 October-3 November 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 30 October and 2 November. Details of possible resulting emissions were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


7 October-13 October 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 10 and 11 October. A plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. on 10 October.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


30 September-6 October 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 1 October. A plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. and rifted W.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


16 September-22 September 2009

Based on information from JMA and pilot observations, the Tokyo VAAC reported that on 17 September ash from Suwanose-jima drifted S. On 19 September, an ash plume rose to an altitude of 1.5 km (5,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


9 September-15 September 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 13-14 September. Details of possible resulting ash plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


2 September-8 September 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 3-7 September. Details of possible resulting ash plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


26 August-1 September 2009

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanose-jima during 27-29 August sometimes produced plumes that rose to altitudes of 1.5-2.4 km (5,000-8,000 ft) a.s.l. and drifted W.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 August-18 August 2009

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanose-jima during 16-17 August produced plumes that rose to an altitude of 1.8 km (6,000 ft) a.s.l. Plumes drifted E on 16 August.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


5 August-11 August 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 10 August. Details of a possible resultant ash plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


29 July-4 August 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 5 August. Details of possible resultant ash plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


22 July-28 July 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 23-24 July. Details of possible resultant ash plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


15 July-21 July 2009

Based on a pilot observation, the Tokyo VAAC reported that on 15 July an ash plume from Suwanose-jima rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted NE. Eruptions reported by the JMA during 16-17 July produced plumes that rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted NE and W.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 July-7 July 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 6 July. Details of a possible resultant ash plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


10 June-16 June 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 16 June. Details of a possible resultant ash plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


20 May-26 May 2009

Based on analysis of satellite imagery and pilot observations, the Tokyo VAAC reported that on 25 May an ash plume from Suwanose-jima rose to an altitude of 1.5 km (5,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


13 May-19 May 2009

The Tokyo VAAC reported an explosion from Suwanose-jima on13 May, as stated by JMA. Details of possible resultant ash plumes were not reported. Based on analysis of satellite imagery and a pilot observation, the VAAC also reported that on 17 May an ash plume rose to an altitude of 2.1 km (7,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


6 May-12 May 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 7-9 and 12 May. Details of possible resultant ash plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


29 April-5 May 2009

Based on information from JMA, the Tokyo VAAC reported that eruptions from Suwanose-jima during 29 April-1 May produced plumes that rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. Plumes drifted W on 30 April and 1 May.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


22 April-28 April 2009

The Tokyo VAAC reported that a pilot saw an ash plume from Suwanose-jima on 22 April. JMA reported that an eruption the next day produced ash plumes to altitudes of 1.2-1.5 km (4,000-5,000 ft) a.s.l. and drifted E and S. On 27 April, an explosion was reported but details of a possible resultant ash plume were not. On 28 April, explosions produced plumes that rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


15 April-21 April 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 21 April. Details of possible resultant ash plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


8 April-14 April 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 8 and 10 April. Details of possible resultant ash plumes on either day were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 April-7 April 2009

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 6 April.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


25 March-31 March 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 28 March. JMA reported three explosions on 30 March. Details of possible resultant ash plumes on either day were not reported.

Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)


11 March-17 March 2009

Based on information from JMA, the Tokyo VAAC reported that on 15 and 16 March eruptions from Suwanose-jima produced plumes that rose to an altitude of 1.5 km (5,000 ft) a.s.l. Plumes drifted E on 15 March.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


4 March-10 March 2009

Based on information from JMA, the Tokyo VAAC reported multiple explosions from Suwanose-jima on 6 March. Details of possible resultant ash plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


25 February-3 March 2009

Based on information from JMA, the Tokyo VAAC reported multiple explosions from Suwanose-jima during 26 February-1 March. On 1 March, resultant plumes rose to altitudes of 1.2-1.5 km (4,000-5,000 ft) a.s.l. and drifted E. On 2 March, an eruption produced a plume to an altitude of 1.5 km (5,000 ft) a.s.l. An explosion was reported on 3 March.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


18 February-24 February 2009

JMA reported that Suwanose-jima erupted explosively on 18 February; a colored plume rose 400 m above the crater and drifted E. Two explosive eruptions occurred the next day. Based on information from JMA, the Tokyo VAAC reported explosions on 20 and 21 February. Details of possible resultant ash plumes were not reported.

Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)


21 January-27 January 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 21 January. Details of a possible resultant ash plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


7 January-13 January 2009

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 9 January.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


31 December-6 January 2009

Based on information from JMA, the Tokyo VAAC reported an eruption from Suwanose-jima on 3 January. A plume rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


24 December-30 December 2008

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 26-28 and 30 December. Plumes rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. during 27-28 December.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


17 December-23 December 2008

Based on information from JMA, the Tokyo VAAC reported that during 17 and 19-20 December explosions or eruptions from Suwanose-jima produced plumes to an altitude of 1.5 km (5,000 ft) a.s.l. Plumes drifted E on 17 and 19 December.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


10 December-16 December 2008

Based on information from JMA, analysis of satellite imagery, and pilot reports, the Tokyo VAAC reported explosions or eruptions from Suwanose-jima during 10-12 and 14-16 December. Plumes rose to altitudes of 0.9-1.8 km (3,000-6,000 ft) a.s.l. and drifted E. Details of a possible ash plume on 14 and 16 December were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


19 November-25 November 2008

Based on information from JMA, the Tokyo VAAC reported an eruption from Suwanose-jima on 21 November. A plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted E. An explosion was reported on 25 November.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 November-18 November 2008

Based on analysis of satellite imagery and information from JMA, the Tokyo VAAC reported multiple explosions or eruptions from Suwanose-jima during 12-16 November. Occasional plumes rose to altitudes of 1.5-2.1 km (5,000-7,000 ft) a.s.l. during 13-15 November.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


5 November-11 November 2008

Based on pilot observations and analysis of satellite imagery, the Tokyo VAAC reported that on 5 November an ash plume from Suwanose-jima rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted NE. The JMA indicated that during 7-8 November explosion or eruption plumes rose to altitudes of 1.2-1.8 km (4,000-6,000 ft) a.s.l. and drifted E. An explosion was reported on 12 November.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


29 October-4 November 2008

Based on information from JMA, the Tokyo VAAC reported that during 29-30 October and 3 November Suwanose-jima produced explosion or eruption plumes that rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted E. Explosions were reported on 31 October and 1 November, but details of possible ash plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


22 October-28 October 2008

Based on information from JMA, the Tokyo VAAC reported that Suwanose-jima produced explosion or eruption plumes that rose to altitudes of 1.5-3 km (5,000-10,000 ft) a.s.l. and drifted W and E during 21, 23, 25-26, and 28 October.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


15 October-21 October 2008

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanose-jima during 16 and 18-20 October produced plumes that rose to altitudes of 1.2-2.4 km (4,000-8,000 ft) a.s.l. and drifted W.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


8 October-14 October 2008

Based on reports from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 9 and 11 October. The altitude and direction of a possible resultant plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 October-7 October 2008

Based on reports from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 1, 3, 7, and 8 October. Plumes rose straight up to an altitude of 2.1 km (7,000 ft) a.s.l. on 8 October. The altitude and direction of plumes were not reported for the other days.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


24 September-30 September 2008

Based on reports from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 25-26 and 28-29 September. Resultant plumes rose to altitudes of 1.5-3 km (5,000-10,000 ft) a.s.l. and drifted NE, E, and SW.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


3 September-9 September 2008

Based on reports from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 5-7 September. Resultant plumes rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. Plumes drifted E on 5 September.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


20 August-26 August 2008

Based on reports from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 24-26 August. Resultant plumes rose to altitudes of 1.8-2.4 km (6,000-8,000 ft) a.s.l. during 25-26 August.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


6 August-12 August 2008

Based on reports from JMA, the Tokyo VAAC reported that on 7 August an eruption plume from Suwanose-jima rose to an altitude of 1.2 km (4,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


23 July-29 July 2008

Based on pilot reports, the Tokyo VAAC reported that on 30 July an ash plume from Suwanose-jima rose to an altitude of 0.6 km (2,000 ft) a.s.l. and drifted S.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


11 June-17 June 2008

Based on information from JMA, the Tokyo VAAC reported that an explosion from Suwanose-jima occurred on 17 June. The altitude and direction of a possible resultant plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


16 April-22 April 2008

Based on information from JMA, the Tokyo VAAC reported that an explosion from Suwanose-jima occurred on 16 April. The altitude and direction of a possible resultant plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


19 March-25 March 2008

Based on information from JMA, the Tokyo VAAC reported that an explosion from Suwanose-jima occurred on 22 March. The altitude and direction of a possible resultant plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


6 February-12 February 2008

Based on information from JMA, the Tokyo VAAC reported that an eruption plume from Suwanose-jima rose to an altitude of 1.8 km (6,000 ft) a.s.l. on 7 February and drifted E. Explosions were also noted on 8, 9, and 13 February, but altitude and direction of possible plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 December-18 December 2007

Based on information from JMA, the Tokyo VAAC reported that eruption plumes from Suwanose-jima rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. during 14-17 December and drifted E. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


5 December-11 December 2007

Based on information from JMA, the Tokyo VAAC reported that eruption plumes from Suwanose-jima rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. on 10 December and drifted W. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


28 November-4 December 2007

Based on information from JMA, the Tokyo VAAC reported that eruption plumes from Suwanose-jima rose to altitudes of 1.2-1.8 km (4,000-6,000 ft) a.s.l. during 29 November-2 December and drifted E. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


24 October-30 October 2007

Based on information from JMA, the Tokyo VAAC reported that eruption plumes from Suwanose-jima rose to an altitude of 1.5 km (5,000 ft) a.s.l. during 26-28 October and drifted E and W. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


17 October-23 October 2007

Based on information from JMA, the Tokyo VAAC reported that an eruption plume from Suwanose-jima rose to an altitude of 1.5 km (5,000 ft) a.s.l. on 22 October and drifted W. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


10 October-16 October 2007

Based on information from JMA, the Tokyo VAAC reported that an eruption plume from Suwanose-jima rose to an altitude of 1.5 km (5,000 ft) a.s.l. on 16 October and drifted E. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 September-18 September 2007

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 17 September. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


25 July-31 July 2007

Based on information from JMA and a pilot report, the Tokyo VAAC reported that an ash plume from Suwanose-jima rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted SW on 26 July. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


2 May-8 May 2007

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 8 May. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


28 March-3 April 2007

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 30 March and 2 April. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


14 March-20 March 2007

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 17 March. Ash was not seen on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


28 February-6 March 2007

Based on information from JMA, the Tokyo VAAC reported that on 2 March an eruption plume from Suwanose-jima rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted W.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


14 February-20 February 2007

Based on information from JMA and satellite imagery, the Tokyo VAAC reported that an explosion from Suwanose-jima produced eruption plumes during 19-20 February. The altitude and direction of the plumes were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


7 February-13 February 2007

Based on information from JMA and satellite imagery, the Tokyo VAAC reported that an explosion from Suwanose-jima produced an eruption plume during 7 February. The altitude and direction of the plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


31 January-6 February 2007

Based on information from JMA and satellite imagery, the Tokyo VAAC reported that an explosion from Suwanose-jima produced an eruption plume during 5-6 February. The altitude and direction of the plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


24 January-30 January 2007

Based on information from JMA, the Tokyo VAAC reported an eruption plume from Suwanose-jima on 28 January. The altitude and direction of the plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


3 January-9 January 2007

Based on information from JMA, the Tokyo VAAC reported an eruption plume from Suwanose-jima on 9 January. The altitude and direction of the plume were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


20 December-26 December 2006

Based on information from JMA, the Tokyo VAAC reported that an eruption from Suwanose-jima occurred on 19 December.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


15 November-21 November 2006

Based on information from JMA, the Tokyo VAAC reported that on 17 November an eruption plume from Suwanose-jima rose straight up to an altitude of 2.1 km (7,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


8 November-14 November 2006

Based on information from JMA, the Tokyo VAAC reported that on 9 November an eruption plume from Suwanose-jima reached an altitude of 1.5 km (5,000 ft) a.s.l. and drifted W.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 November-7 November 2006

Based on satellite imagery and information from JMA, the Tokyo VAAC reported that during 4-6 November eruption plumes from Suwanose-jima reached altitudes of 1.2 km (4,000 ft) a.s.l. The plumes drifted E and SW.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


25 October-31 October 2006

Based on information from JMA, the Tokyo VAAC reported that on 27 and 28 October, ash plumes from Suwanose-jima reached altitudes of 1.8 km (6,000 ft) a.s.l. Plumes drifted E on 28 October.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


18 October-24 October 2006

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 18 October.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


11 October-17 October 2006

Based on information from JMA and a pilot report, the Tokyo VAAC reported that on 14, 16, and 17 October, ash plumes from Suwanose-jima reached altitudes of 3 km (10,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


4 October-10 October 2006

Based on information from JMA, the Tokyo VAAC reported an explosion from Suwanose-jima on 6 October.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


20 September-26 September 2006

On 20 September the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite caught Suwanose-jima in the process of emitting volcanic ash and steam. The volcano's emissions blew N, gradually fanning out over the ocean, with a grayish tinge that distinguished it from nearby white clouds. Aviation ash advisories for this eruption issued by the Tokyo VAAC based on satellite imagery, pilot reports, and JMA, noted that the plume rose to 2.1 km (7,000 ft) a.s.l. and extended about 80 km N.

Sources: NASA Earth Observatory, Tokyo Volcanic Ash Advisory Center (VAAC)


13 September-19 September 2006

Based on information from JMA and a pilot report, the Tokyo VAAC reported on 19 September that ash plumes from Suwanose-jima reached altitudes of 3.4 km (11,000 ft) a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


23 August-29 August 2006

Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanose-jima produced eruption plumes that rose straight up to 1.8 km (6,000 ft) a.s.l. on 26 August. On 28 August, eruption plumes rose to altitudes of 1.5 km (5,000 ft) a.s.l. and drifted E. Ash was not identified on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


9 August-15 August 2006

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 11-14 August. The resulting plumes reached maximum altitudes of 1.8 km (6,000 ft) a.s.l. and drifted N and W. Ash was not identified on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


26 July-1 August 2006

Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 26-30 July. The resulting plumes reached maximum altitudes of 1.8 km (6,000 ft) a.s.l. and drifted N. Ash was not identified on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 July-18 July 2006

A pilot observed an ash plume from Suwanose-jima on 16 July that reached an altitude of 1.8 km (6,000 ft) a.s.l. and drifted N. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


28 June-4 July 2006

Based on information from JMA, the Tokyo VAAC reported on 30 June that a small plume from Suwanose-jima reached an altitude of 1.2 km (4,000 ft) a.s.l. and drifted NE.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


7 June-13 June 2006

A pilot observed ash from Suwanose-jima on 7 June at an altitude of 2.4 km (8,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


12 April-18 April 2006

Based on information from JMA and an aircraft report, the Tokyo VAAC reported that ash from Suwanose-jima was visible at a height of ~1.5 km (5,000 ft) a.s.l. on 16 April.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 March-7 March 2006

Based on information from JMA, the Tokyo VAAC reported that several explosions occurred at Suwanose-jima during 2-7 March. The highest plume reached ~1.8 km (6,000 ft) a.s.l. on 5 March.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


22 February-28 February 2006

Based on information from JMA, the Tokyo VAAC reported that during 22-24 February several small eruptions occurred at Suwanose-jima. The highest rising plume reached ~3 km (10,000 ft) a.s.l. after an eruption on 23 February.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 February-7 February 2006

Based on information from JMA, the Tokyo VAAC reported that several explosions occurred at Suwanose-jima during 6-7 February. A resultant plume from an explosion on the 6th rose to 1.2 km (4,000 ft) a.s.l. and extended NW.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


4 January-10 January 2006

Based on information from JMA, the Tokyo VAAC reported that explosions occurred at Suwanose-jima on 1 and 10 January. An explosion on 10 January produced an ash plume to a height of ~1.8 km (6,000 ft) a.s.l. The heights of ash clouds from other explosions were not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


21 September-27 September 2005

Based on information from JMA, the Tokyo VAAC reported that an emission from Suwanose-jima on 22 September reached a height of ~1.8 km (6,000 ft) a.s.l. and drifted W. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


10 August-16 August 2005

Based on information from JMA, the Tokyo VAAC reported that small eruptions at Suwanose-jima on 11 and 12 August produced ash plumes to a height of ~3.4 km (11,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


27 July-2 August 2005

A pilot observed ash from Suwanose-jima on 28 July at a height of 2.4 km (~8,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


6 July-12 July 2005

Based on information from JMA, the Tokyo VAAC reported that an explosion occurred at Suwanose-jima on 6 July at 1400. The height of the resultant ash cloud was not reported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


1 June-7 June 2005

Based on information from JMA, the Tokyo VAAC reported that during 1-6 June several explosions at Suwanose-jima produced ash clouds. The only known height of an ash cloud was ~1.8 km (5,900 ft) a.s.l. from an explosion on 1 June.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


25 May-31 May 2005

Based on information from JMA, the Tokyo VAAC reported that several explosions occurred at Suwanose-jima during 26-31 May. The highest reported plume rose to ~2.1 km (~7,000 ft) a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


27 April-3 May 2005

Based on information from JMA, the Tokyo VAAC reported that an eruption at Suwanose-jima on April 26 produced a plume to 1.2 km (4,000 ft) a.s.l. that extended E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


9 March-15 March 2005

Based on information from JMA, the Tokyo VAAC reported that an explosion at Suwanose-jima on 9 March produced an ash plume to a height of ~1.8 km a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


2 March-8 March 2005

Based on information from JMA, the Tokyo VAAC reported that emissions from Suwanose-jima on 6 and 8 March produced ash plumes that rose to 1.5 and 1.2 km a.s.l., respectively.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


29 December-4 January 2005

On 29 December, the Tokyo VAAC reported an eruption at Suwanose-jima that produced an ash plume to ~1.2 km a.s.l. Eruptions were also reported on 1 and 4 January, but no plumes were visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


22 December-28 December 2004

Based on information from JMA, the Tokyo VAAC reported that eruptions at Suwanose-jima produced ash plumes to unknown heights on 22, 24, 25, and 27 December. The plumes were not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


15 December-21 December 2004

Based on information from JMA, the Tokyo VAAC reported that an eruption at Suwanose-jima on 20 December produced a SE-drifting plume to ~1.8 km a.s.l. Also, on 21 December an eruption produced a SE-drifting ash plume to an unknown height.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


24 November-30 November 2004

Based on information from JMA, the Tokyo VAAC reported that an eruption occurred at Suwanose-jima on 30 November at 1607. The eruption produced a plume to a height of ~1.2 km.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


30 June-6 July 2004

Based on information from JMA, the Tokyo VAAC reported that several explosions occurred at Suwanose-jima during 30 June to 5 July. The highest rising plume reached ~1.9 km a.s.l.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


9 June-15 June 2004

An eruption at Suwanose-jima on 9 June at 1003 produced an ash plume visible on satellite imagery at a height of ~1.8 km a.s.l., extending E. Another explosion at 1300 that day produced an ash plume that reached an unknown height.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


2 June-8 June 2004

On 7 June Suwanose-jima erupted, producing a plume to ~2 km a.s.l. that extended E. Eruptions continued through 8 June with at least one explosion producing a gas-and-ash plume to ~2 km a.s.l. that also drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


28 April-4 May 2004

According to the Tokyo VAAC, ash emitted from Suwanose-jima was reported on 28 April at a height of ~3 km a.s.l. extending SE. No ash was visible on satellite imagery. JMA reported that an explosion occurred on 1 May at 0906, but it was not known if an ash cloud was produced.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


21 January-27 January 2004

Based on information from the Japanese Meteorological Agency, the Tokyo VAAC reported that explosions at Suwanose-jima on 21 and 22 January produced ash plumes to unknown heights.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


31 December-6 January 2004

Based on information from JMA, the Tokyo VAAC reported that on 2 and 4 January small explosions occurred at Suwanose-jima producing ash plumes to unknown heights.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


24 December-30 December 2003

Based on information from JMA, the Tokyo VAAC reported that several small ash emissions from Suwanose-jima on 27 and 28 December rose to unknown heights. Ash from an eruption on 28 December at 0820 reached a height of ~1.5 km a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


17 December-23 December 2003

Based on information from the Japanese Meteorological Agency, the Tokyo VAAC reported that an explosion at Suwanose-jima on 21 December at 1828 produced a plume to an unknown height.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


10 December-16 December 2003

Based on information from JMA, the Tokyo VAAC reported that an explosion at Suwanose-jima on 15 December at 1946 produced a plume to an unknown height.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


11 September-17 September 2002

Activity at Suwanose-jima was relatively low from 26 August until 12 September. On the 12th explosive eruptions began to occur frequently. According to the Suwanose-jima office of Toshima village, rumbling was intermittently heard about 4 km SSW of the summit and small amounts of ash fell. Explosions continued to occur until at least 13 September.

Source: Japan Meteorological Agency (JMA) via the Volcano Research Center


21 August-27 August 2002

Eruptive activity began to decline at Suwanose-jima in comparison to the previous week. Periods of volcanic tremor occurred on the 19th and 20th. According to the Suwanose-jima office of Toshima Village, rumbling sounds were not as strong as those of the previous week, but were sometimes accompanied by the sounds of large explosions on the 20th. Small amounts of ash fell in inhabited areas about 4 km SSW of the summit on the 20th and 21st. On the afternoon of the 20th ash also fell in Naze city on Amami-oshima Island, about 140 km S of Suwanose-jima. Aerial inspections conducted during the report period by the staff of Kagoshima Meteorological Observatory revealed that an ash-rich cloud rose 1.5 km above the crater and drifted S.

Source: Japan Meteorological Agency (JMA) via the Volcano Research Center


14 August-20 August 2002

Small explosive eruptions occurred at Suwanose-jima on 19 August. JMA reported that on the 19th two periods of continuous acoustic signals were recorded for 20-30 minutes each beginning around 0000 and 0630. The signals were the largest recorded thus far this year. Explosions and rumbling were heard from Toshima village, and an ash plume drifted to the SW. Volcanic tremor with continuous large acoustic signals was also recorded later in the day during 0940-0950 and 1410-1500. Small tremor events also occurred, and ash rose above the summit to an unknown height and drifted SE.

Sources: Japan Meteorological Agency (JMA) via the Volcano Research Center, Kyodo News, Associated Press


12 June-18 June 2002

Based on information from aircraft reports and JMA, the Tokyo VAAC stated that volcanic ash from Suwanose-jima was reported on 18 June at 1058 at a height of ~6 km drifting E. Ash was not visible on satellite imagery.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)


17 October-23 October 2001

On 11 October at 1400 an eruption began at Suwanose-jima. Volcanic tremor associated with the eruption was detected during 11 October through at least 15 October. Up to eleven explosions were counted. Acoustic microphones recorded four shock waves associated with large explosions.

Sources: Volcano Research Center-Earthquake Research Institute (University of Tokyo), Japan Meteorological Agency (JMA)


25 July-31 July 2001

Volcanic tremor was detected near Suwanose-jima's On-take (Otake) crater beginning on 25 July at 2200 until at least 26 July. JMA reported that an eruption on 26 July at 1430 produced a volcanic plume that rose to 1.3 km above the crater and drifted to the S. That day seismometers ~2 km SW of the crater recorded explosions at 0501, 0558, 0935, and 1055. According to the Suwanose-jima Branch of the Toshima Village Office, ash fell the morning of 26 July.

Source: Volcano Research Center-Earthquake Research Institute (University of Tokyo)


9 May-15 May 2001

Beginning on the morning of 9 May volcanic activity increased at Suwanose-jima when a tremor event commenced. The tremor increased at 1100 and became more violent at 2100. Around noon on 11 May an eruption produced an ash cloud that rose 1-1.5 km above the crater. The Suwanose-jima Branch of Toshima village, ~4 km NNW of the active On-take (Otake) crater, reported that abundant ash fall was observed in the village on 11 May. Vigorous eruptions on the evening of 12 May and the morning of 13 May deposited up to 3 cm of ash in the village. At 0900 on 14 May the eruption seemed to have stopped. The Sakurajima Volcano Observatory reported that plumes associated with volcanic tremor events have been observed at Suwanose-jima since the new crater was formed during the December 2000 eruption.

Sources: Volcano Research Center-Earthquake Research Institute (University of Tokyo), Tokyo Volcanic Ash Advisory Center (VAAC)


17 January-23 January 2001

At ~1700 on 19 December 2000, a Suwanose-jima inhabitant reported "smoke" rising NE of the summit crater. During observations from a helicopter, ash-laden smoke and high-temperature gas emissions were seen emanating from new craters. The Sakura-jima Volcano Research Center observed an increase in volcanic earthquakes deeper than 1 km below the summit in comparison to Fall 1999. They also noted an increase in volcanic earthquakes and tremor shallower than 1 km in comparison to early 2000. Researchers will continue to closely monitor the volcano.

Source: Volcano Research Center-Earthquake Research Institute (University of Tokyo)


Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2004 Oct 23 2013 Sep 12 (continuing) Confirmed 2 Historical Observations O-take
2000 Dec 19 2004 Jul 5 (?) Confirmed 3 Historical Observations O-take (Upper NE flank)
2000 Feb 24 ± 4 days 2000 Feb 24 ± 4 days Confirmed 2 Historical Observations O-take
1999 Jun 15 ± 5 days 1999 Jun 30 ± 4 days Confirmed 1 Historical Observations O-take
1999 Jan 5 ± 5 days 1999 Feb 24 ± 4 days Confirmed 1 Historical Observations O-take
1996 Dec 26 1997 Apr 17 Confirmed 1 Historical Observations O-take
1990 Apr 1996 Jul 14 Confirmed 2 Historical Observations O-take
1988 Jan 1989 Dec Confirmed 2 Historical Observations O-take
1985 Sep 1987 Jun Confirmed 2 Historical Observations O-take
1984 Oct 1984 Oct Confirmed 2 Historical Observations O-take
1960 (?) Unknown Confirmed 0 Historical Observations Submarine E flank (Suwanose-jima Oki)
1956 Nov 1984 May Confirmed 2 Historical Observations O-take
1954 (?) Unknown Confirmed 0 Historical Observations Submarine E flank (Suwanose-jima Oki)
1949 Oct 1954 Confirmed 2 Historical Observations O-take
1940 Nov 29 Unknown Confirmed 2 Historical Observations O-take
1938 Mar 11 1938 Mar 11 Confirmed 2 Historical Observations O-take
[ 1934 Jan 11 ] [ Unknown ] Uncertain 2   O-take
1925 May 13 Unknown Confirmed 2 Historical Observations O-take
1921 Dec 8 1922 Jan 26 Confirmed 2 Historical Observations O-take
[ 1915 Jul ] [ 1915 Sep ] Uncertain 2   O-take
[ 1914 Mar 21 ] [ Unknown ] Uncertain     O-take
1889 Oct 2 1889 Oct 13 Confirmed 4 Historical Observations O-take
1885 Jan 1885 May Confirmed 2 Historical Observations O-take
1884 Unknown Confirmed 1 Historical Observations Northeastern summit crater (O-take)
1877 Unknown Confirmed 4 Historical Observations
1813 1814 Confirmed 4 Historical Observations SW ridge fissure and O-take
1600 (?) Unknown Confirmed 4 Tephrochronology

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Japan Meteorological Agency, 1996. National Catalogue of the Active Volcanoes in Japan (second edition). Tokyo: Japan Meteorological Agency, 502 p (in Japanese).

Japan Meteorological Agency, 2013. National Catalogue of the Active Volcanoes in Japan (fourth edition, English version). Japan Meteorological Agency.

Kuno H, 1962. Japan, Taiwan and Marianas. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 11: 1-332.

Nakano S, Yamamoto T, Iwaya T, Itoh J, Takada A, 2001-. Quaternary Volcanoes of Japan. Geol Surv Japan, AIST, http://www.aist.go.jp/RIODB/strata/VOL_JP/.

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The 8-km-long, spindle-shaped island of Suwanosejima in the northern Ryukyu Islands consists of an andesitic stratovolcano with two historically active summit craters. The summit of the volcano is truncated by a large breached crater extending to the sea on the east flank that was formed by edifice collapse. Suwanosejima, one of Japan's most frequently active volcanoes, was in a state of intermittent strombolian activity from Otake, the NE summit crater, that began in 1949 and lasted until 1996, after which periods of inactivity lengthened. The largest historical eruption took place in 1813-14, when thick scoria deposits blanketed residential areas, and the SW crater produced two lava flows that reached the western coast. At the end of the eruption the summit of Otake collapsed forming a large debris avalanche and creating the horseshoe-shaped Sakuchi caldera, which extends to the eastern coast. The island remained uninhabited for about 70 years after the 1813-1814 eruption. Lava flows reached the eastern coast of the island in 1884. Only about 50 persons live on the island.