Available Weekly Reports
| Ambrym |

Based on pilot observations and analyses of satellite imagery, the Wellington VAAC reported that on 19 July an ash plume from Ambrym rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 185 km NW.
20 July 2011
Back to Top22 June 2011
Back to Top18 August 2010
Back to Top3 March 2010
Back to Top2 December 2009
Back to Top25 March 2009
Back to Top2 May 2007
Back to Top25 April 2007
Back to Top28 March 2007
Back to Top31 March 2004
Back to TopBelow is a summary of eruption dates and Volcanic Explosivity Indices (VEI).
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.
Bani P, Oppenheimer C, Tsanev V I, Carn S A, Cronin S J, Crimp R, Calkins J A, Charley D, Lardy M, Roberts T R, 2009. Surge in sulphur and halogen degassing from Ambrym volcano, Vanuatu. {Bull Volc}, 71: 1159-1168
Carniel R, Di Cecca M, Rouland D, 2003. Ambrym, Vanuatu (July-August 2000): spectral and dynamical transitions on the hours-to-days timescale. {J Volc Geotherm Res}, 128: 1-13
Eissen J-P, Blot C, Louat R, 1991. Chronologie de l'activite volcanique historique de l'arc insulaire des Nouvelles-Hebrides de 1595 a 1991. {ORSTOM Rapports Sci Tech Sci Terre Geol-Geophys}, 2: 1-69
Eissen J-P, Monzier M, Robin C, Picard C, Douglas C, 1990. Report on the volcanological field work on Ambrym and Tanna Islands (Vanuatu) from 2 to 25 September 1990. {Orstom (Noumea) Rapport Missions Sci Terre Geol-Geophys}, 22: 1-22
Fisher N H, 1957. Melanesia. {Catalog of Active Volcanoes of the World and Solfatara Fields}, Rome: IAVCEI, 5: 1-105
Green J, Short N M, 1971. {Volcanic Landforms and Surface Features: a Photographic Atlas and Glossary}. New York: Springer-Verlag, 519 p
Gregory J W, 1917. The Ambrym eruptions of 1913-14. {Geol Mag}, 4: 529-540
McCall G J H, LeMaitre R W, Malahoff A, Robinson G P, Stephenson P J, 1970. The geology and geophysics of the Ambrym Caldera, New Hebrides. {Bull Volc}, 34: 681-696
Monzier M, Danyushevsky L V, Crawford A J, Bellon H, Cotton J, 1993. High-Mg andesites from the southern termination of the New Hebrides island arc (SW Pacific). {J Volc Geotherm Res}, 57: 193-217
New Hebrides Geological Survey, 1976. Geology of Pentecost and Ambrym. {New Hebrides Geol Surv}, 1:100,000 geol map sheet 6
Robin C, Eissen J-P, Monzier M, 1993. Giant tuff cone and 12-km-wide associated caldera at Ambrym volcano (Vanuatu, New Hebrides arc). {J Volc Geotherm Res}, 55: 225-238
Smithsonian Institution-SEAN, 1975-89. [Monthly event reports]. {Bull Scientific Event Alert Network (SEAN)}, v 1-14
Stephenson P J, McCall G J H, LeMaitre R W, Robinson G P, 1968. The Ambrym Island Research Project. {New Hebrides Geol Surv Ann Rpt 1966}, p 9-15
Ambrym, a large basaltic volcano with a 12-km-wide caldera, is one of the most active volcanoes of the New Hebrides arc. A thick, almost exclusively pyroclastic sequence, initially dacitic, then basaltic, overlies lava flows of a pre-caldera shield volcano. The caldera was formed during a major plinian eruption with dacitic pyroclastic flows about 1900 years ago. Post-caldera eruptions, primarily from Marum and Benbow cones, have partially filled the caldera floor and produced lava flows that ponded on the caldera floor or overflowed through gaps in the caldera rim. Post-caldera eruptions have also formed a series of scoria cones and maars along a fissure system oriented ENE-WSW. Eruptions have apparently occurred almost yearly during historical time from cones within the caldera or from flank vents. However, from 1850 to 1950, reporting was mostly limited to extra-caldera eruptions that would have affected local populations.