Rymer, Hazel; Locke, Corinne; Ófeigsson, Benedikt G.; Einarsson, Páll and Sturkell, Erik
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|DOI (Digital Object Identifier) Link:||http://dx.doi.org/doi:10.1111/j.1365-3121.2010.00948.x|
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Askja is an active central volcano located on the NS trending en echelon rift zone marking the mid-Atlantic plate boundary in North Iceland. Between 2007 and 2009, we observed a gravity increase at the centre of the caldera. This contrasts with net gravity decreases recorded between 1988 and 2007 interpreted previously in terms of magma drainage. The recent gravity increase is rapid, but similar in terms of lateral extent to the preceding decrease. This gravity increase corresponds to a sub-surface mass increase of 0.68×1011kg at about 3km depth. It is possible that the new gravity increases observed at Askja reflect accumulation of magma beneath the caldera and thus may herald a new phase in the activity of this volcano, which last erupted in 1961.
|Item Type:||Journal Article|
|Copyright Holders:||2010 Blackwell Publishing Ltd|
|Funders:||Natural Environment Research Council, Earthwatch|
|Keywords:||Askja volcano; microgravity; eruption|
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Hazel Rymer|
|Date Deposited:||09 Jun 2010 12:02|
|Last Modified:||26 Nov 2012 17:51|
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