{"ID":1024,"name":"Atka","location":[{"name":"Alaska","url":"https:\/\/comet.nerc.ac.uk\/location\/alaska\/","slug":"alaska","id":45,"api_endpoint":"https:\/\/comet.nerc.ac.uk\/wp-json\/volcanodb\/v1\/location\/45"}],"volcano_number":"311160","country":"United States","geodetic_measurements":"Yes","deformation_observation":"Yes","duration_of_observation":"1997 - 2007","characteristics_of_deformation":"
Atka volcanic center also includes the volcanoes Korovin and Kliuchef. Kliuchef showed a\u00a0small amount of localised subsidence during 1997\u20131998, 1998\u20131999, and 2004 \u2013 2005. Uplift in this region was then observed\u00a0during 1999 \u2013 2000, 2003 \u2013 2004 and\u00a0again in June 2006 continuing until the time of the last InSAR observations.
\nThe source of deformation is located on the western flank of Kliuchef. The source of uplift is located at 5 – 7 km depth. The rate of volume increase is seen to fluctuate and is superimposed upon a trend of steady increase at 0.005 km\u00b3\/yr.\u00a0Uplift is attributed to an\u00a0intrusion of magma into a storage zone 5\u20138 km beneath the summit area. The source of subsidence is located\u00a03 \u2013 4 km below the surface, and is likely to be due to depressurisation caused by\u00a0cooling and fluid loss from the uppermost part of the magma storage zone and\/or the overlying hydrothermal system.<\/p>\n","latitude":"52.332","longitude":"-174.137","images":[{"path":"\/nas\/content\/live\/cometnerc\/wp-content\/uploads\/figures_sentinel\/atka\/atka_161D_03795_040404.jpg","url":"https:\/\/comet.nerc.ac.uk\/wp-content\/uploads\/figures_sentinel\/atka\/atka_161D_03795_040404.jpg","width":501,"height":669,"mime":"image\/jpeg","size":122685,"filename":"atka_161D_03795_040404.jpg"},{"path":"\/nas\/content\/live\/cometnerc\/wp-content\/uploads\/figures_sentinel\/atka\/atka_037A_03794_030304.jpg","url":"https:\/\/comet.nerc.ac.uk\/wp-content\/uploads\/figures_sentinel\/atka\/atka_037A_03794_030304.jpg","width":501,"height":660,"mime":"image\/jpeg","size":119929,"filename":"atka_037A_03794_030304.jpg"}],"uri":"https:\/\/comet.nerc.ac.uk\/volcanoes\/atka\/","api_endpoint":"https:\/\/comet.nerc.ac.uk\/wp-json\/volcanodb\/v1\/volcano\/1024","measurement_methods":"InSAR","inferred_causes":"Hydrothermal, Magmatic","references":["Lu, Z., and Dzurisin, D., 2014, InSAR imaging of Aleutian volcanoes: Chichester, UK, Springer-Praxis, 390 p.","U.S. Geological Survey Alaska Volcano Observatory (AVO) website
\nhttp:\/\/www.avo.alaska.edu\/volcanoes\/volcinfo.php?volcname=Atka"],"date_added":"2015-04-09 15:46:31","last_modified":"2015-04-09 15:46:31"}