Derecho! Posted March 13, 2012 Share Posted March 13, 2012 I'm sure the apocalpytikooks and nutters will be all over this; does seem signficant, though a lot of calderas have much more movement and haven't erupted (Iwo Jima, Campei Flegrei) GEOPHYSICAL RESEARCH LETTERS, doi:10.1029/2012GL051286 Recent Geodetic Unrest at Santorini Caldera, Greece Key Points Santorini is deforming appreciably for the 1st time since its last eruption A dense GPS network has unprecedented data coverage Activity is centered in the region that blew-out in the 1650 BC Minoan Eruption Authors: Andrew V. V Newman Stathis Stiros Lujia Feng Panos Psimoulis Fanis Moschas Vasso Saltogianni Yan Jiang Costas Papazachos Dimitris G. Panagiotopoulos Eleni Karagianni Dominikos Vamvakaris After approximately 60 years of seismic quiescence within Santorini caldera, in January 2011 the volcano reawakened with a significant seismic swarm and rapidly expanding radial deformation. The deformation is imaged by a dense network of 19 survey and 5 continuous GPS stations, showing that as of 21 January 2012, the volcano has extended laterally from a point inside the northern segment of the caldera by about 140 mm and is expanding at 180 mm/yr. A series of spherical source models show the source is not migrating significantly, but remains about 4 km depth and has expanded by 14 million m3 since inflation began. A distributed sill model is also tested, which shows a possible N-S elongation of the volumetric source. While observations of the current deformation sequence is unprecedented at Santorini, it is not certain that an eruption is imminent as other similar calderas have experienced comparable activity without eruption. Received 8 February 2012; accepted 6 March 2012. Link to comment Share on other sites More sharing options...
aslkahuna Posted March 13, 2012 Share Posted March 13, 2012 they conclude that even if it does erupt the effects would be limited to the local area, so apocalypse cancel. I agree, we have to give the system time to rebuild before we get another big event and that takes time on the geological scale not the human one. Steve Link to comment Share on other sites More sharing options...
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