{"id":942,"date":"2016-08-19T09:44:59","date_gmt":"2016-08-19T00:44:59","guid":{"rendered":"http:\/\/www.eri.u-tokyo.ac.jp\/en\/?p=942"},"modified":"2016-08-22T09:43:43","modified_gmt":"2016-08-22T00:43:43","slug":"foreshock-migration-preceding-the-2016-mw-7-0-kumamoto-earthquake-japan","status":"publish","type":"post","link":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/research\/942\/","title":{"rendered":"Foreshock migration preceding the 2016 Mw 7.0 Kumamoto earthquake, Japan"},"content":{"rendered":"<p style=\"text-align: center\">Aitaro Kato,\u3000Jun&#8217;ichi Fukuda,\u3000Shigeki Nakagawa,\u3000Kazushige Obara<\/p>\n<p style=\"text-align: center\">Accepted manuscript online: 16 August 2016Full publication history<br \/>\nDOI: 10.1002\/2016GL070079<\/p>\n<p style=\"text-align: left\">Abstract<br \/>\nWe investigated the spatio-temporal evolution of an earthquake sequence following a series of large shallow intraplate earthquakes, including a Mw 6.2 foreshock and Mw 7.0 mainshock, in the Kumamoto area of Kyushu, SW Japan. To more precisely characterize the evolution of the earthquake sequences, we applied a matched filter technique to continuous waveform data, using template events obtained via a double-difference relocation algorithm. Migrations of seismicity fronts along the directions of fault strike and dip are clearly seen, starting immediately after the Mw 6.2 foreshock. These migrations are interpreted to result from aseismic slip triggered by the foreshock, propagating towards the nucleation point of the subsequent Mw 7.0 mainshock rupture. When combined with static stress changes induced by the Mw 6.2 foreshock, it is likely that stress transfer from both aseismic and seismic slip during the foreshock sequence loaded stress onto the mainshock rupture faults, bringing them closer to failure.<\/p>\n<p style=\"text-align: left\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-943\" src=\"http:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig1-300x300.jpg\" alt=\"fig1\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig1-300x300.jpg 300w, https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig1-150x150.jpg 150w, https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig1-768x768.jpg 768w, https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig1.jpg 898w\" sizes=\"(max-width: 300px) 85vw, 300px\" \/><\/p>\n<p style=\"text-align: left\">\n<p style=\"text-align: left\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-946\" src=\"http:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig.3-300x263.jpg\" alt=\"fig.3\" width=\"300\" height=\"263\" srcset=\"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig.3-300x263.jpg 300w, https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig.3-768x673.jpg 768w, https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig.3-1024x897.jpg 1024w, https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig.3-1200x1051.jpg 1200w, https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-content\/uploads\/sites\/2\/2016\/08\/fig.3.jpg 1445w\" sizes=\"(max-width: 300px) 85vw, 300px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aitaro Kato,\u3000Jun&#8217;ichi Fukuda,\u3000Shigeki Nakagawa,\u3000Kazushige Obara Accepted manuscript online: 16 August 20 &hellip; <a href=\"https:\/\/www.eri.u-tokyo.ac.jp\/en\/research\/942\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Foreshock migration preceding the 2016 Mw 7.0 Kumamoto earthquake, Japan&#8221;<\/span><\/a><\/p>\n","protected":false},"author":9,"featured_media":943,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"_links":{"self":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/942"}],"collection":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/comments?post=942"}],"version-history":[{"count":6,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/942\/revisions"}],"predecessor-version":[{"id":950,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/942\/revisions\/950"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media\/943"}],"wp:attachment":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media?parent=942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/categories?post=942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/tags?post=942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}