Available Weekly Reports
1 May-7 May 2013
According to NASA Earth Observatory (EO) an image acquired on 7 April from the Advanced Land Imager (ALI) on NASA's EO-1 satellite showed that Mawson's Peak crater on Heard Island had filled and a lava flow had traveled down the SW flank. The lava flow was visible in an image acquired on 20 April and had slightly widened just below the summit.
Sources: NASA Earth Observatory
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7 June 2006Back to Top
Summary of eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|2006 Mar 11||2008 Mar 3||Confirmed||0||Historical||Mawson Peak|
|2003 Jun 9||2004 Jun 14||Confirmed||0||Historical||Mawson Peak|
|2000 Mar 7 (?)||2001 Feb||Confirmed||1||Historical||Mawson Peak and upper south flank|
|1993 Jan 2 ± 15 days||Unknown||Confirmed||2||Historical||Mawson Peak|
|1992 May 29 (?)||Unknown||Confirmed||0||Historical||Mawson Peak|
|[ 1992 Jan 17 ]||[ 1992 Jan 18 ]||Uncertain||Mawson Peak|
|1985 Jan 14||1987 Jan (?)||Confirmed||2||Historical||Mawson Peak|
|1954 Apr 13 (?)||1954 Jun 13 (?)||Confirmed||2||Historical||Mawson Peak|
|1953 Aug 20||1953 Nov 18||Confirmed||2||Historical||Mawson Peak|
|1950 Jan 24||1952 Mar 12 (?)||Confirmed||2||Historical||Mawson Peak|
|1910 Mar||1910 Apr||Confirmed||2||Historical||Mawson Peak|
|[ 1881 Jun 2 ]||[ Unknown ]||Uncertain||2|
Heard Island on the Kerguelen Plateau in the southern Indian Ocean consists primarily of the emergent portion of two volcanic structures. The large glacier-covered composite basaltic-to-trachytic cone of Big Ben comprises most of the island, and the smaller Mt. Dixon volcano lies at the NW tip of the island across a narrow isthmus. Little is known about the structure of Big Ben volcano because of its extensive ice cover. The historically active Mawson Peak forms the island's 2745-m high point and lies within a 5-6 km wide caldera breached to the SW side of Big Ben. Small satellitic scoria cones are mostly located on the northern coast. Several subglacial eruptions have been reported in historical time at this isolated volcano, but observations are infrequent and additional activity may have occurred.