{"id":156,"date":"2014-04-02T00:00:02","date_gmt":"2014-04-01T15:00:02","guid":{"rendered":"http:\/\/www.eri.u-tokyo.ac.jp\/_html\/en\/?p=156"},"modified":"2016-04-14T14:29:39","modified_gmt":"2016-04-14T05:29:39","slug":"2nd-april-2014-earthquake-off-chile-updated4th-april-2014","status":"publish","type":"post","link":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/eq\/156\/","title":{"rendered":"2nd April 2014, earthquake off Chile (Updated:4th April 2014)"},"content":{"rendered":"

Launched: April 2nd 2014<\/p>\n

Last updated: April 4th 2014<\/p>\n

 <\/p>\n

On 1st April 2014, 23:46:46 UTC, Magnitude 8.2 earthquake(according to USGS) occurred off coast Chile.<\/p>\n

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\u00a0 Moment Tensor Solution derived by W-phase Source Inversion<\/strong> Following is the Moment Tensor Solution derived by W-phase Source Inversion using waveform data recorded in regional scale. This method is developed by Kanamori and Rivera (2008).<\/p>\n

(Associate Prof.Hiroshi Tsuruoka)<\/p>\n

\"mec20140402\"<\/a> \"wp20140402\"<\/a><\/p>\n

Distribution of great earthquakes since 20th century<\/strong> (Prof. Kenji Satake) \"Distribution<\/a> Distribution of great earthquakes since 20th century<\/p>\n

 <\/p>\n

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Earthquake distribution<\/strong><\/p>\n

(Project Researcher: Satoko Murotani)<\/p>\n

\"Hypocentral<\/a><\/p>\n

Hypocentral Distribution of the 2014 Chile earthquake above M4. (a)Main shock. (b)Fore shocks. (c)Aftershocks.<\/p>\n

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\"Magnitude-time<\/a> Magnitude-time diagram for 1 month<\/p>\n

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Maximum Tsunami Height Distribution from tsunami simulation<\/strong><\/p>\n

(Project Researcher: Aditya Riadi Gusman)<\/p>\n

\"Maximum<\/a> Maximum Tsunami Height Distribution from tsunami simulation<\/p>\n

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Tsunami simulation of the Chilean tsunami<\/strong><\/p>\n

*Black triangles are locations of DART stations.<\/p>\n

(Prof. Kenji Satake)<\/p>\n

Click the figure below to watch the simulation movie:<\/p>\n

\"Tsunami<\/a><\/p>\n

Tsunami simulation of the Chilean tsunami Black triangles are locations of DART stations.<\/p>\n

 <\/p>\n

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Tsunami propagation recorded on DART stations<\/strong><\/p>\n

\uff08Project Researcher: Mohammad Heidarzadeh) \"Tsunami<\/a><\/p>\n

Tsunami propagation\u3000recorded on DART stations<\/p>\n

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Waveform observed on the J-array<\/strong><\/p>\n

visit :http:\/\/wwweic.eri.u-tokyo.ac.jp\/topics\/20140402\/index-j.html#JARRAY<\/a><\/p>\n

\uff08Earthquake and Volcano Information Center)<\/p>\n

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Tsunami source periods using DART spectra<\/strong><\/p>\n

\uff08Project Researcher: Mohammad Heidarzadeh)<\/p>\n

\"<\/a> Tsunami source periods using DART spectra.<\/p>\n

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Analysis of teleseismic waveform inversion<\/strong><\/p>\n

Result of teleseismic waveform inversion by Kikuchi and Kanamori (1991) method is done using the W-phase source inversion derived by Earthquake and Volcano Information Center. The rupture is propagated toward south and the large slip area is located a bit deeper in the southeast of the initial rupture point. Though the mechanism maybe slightly differed, the location of the large slip area will be the same. (*This solution may be differed according to the further analysis) (Project Researcher: Satoko Murotani) Location (USGS) : 19.64\u309cS, 70.82\u309cW, Dep=20km Seismic moment M0 = 1.9E+21 Nm, Mw = 8.1 Rupture area\u3000200 km x 120 km, Vrmax = 3.8 km\/s Average slip Dave = 1.9m, Maximum slip Dmax = 4.6m<\/p>\n

\"Result<\/a><\/p>\n

Result of teleseismic waveform inversion by Kikuchi and Kanamori (1991) method. (a)Source time function, fault mechanism, and slip distribution. (b)Slip distribution with 1m contour interval and aftershock until 2:43(UTC) on 3rd April.<\/p>\n

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 <\/p>\n

\u00a0Results derived from back-projecting USArray seismic data<\/strong><\/p>\n

Results derived from back-projecting USArray seismic data filtered in several frequency bands suggest that the high frequency energy was mainly radiated from the deep portion of rupture area. The source duration is about 80s.<\/p>\n

(Project Researcher: Dun Wang)<\/p>\n

\"Fig.1-location-Vr\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Launched: April 2nd 2014 Last updated: April 4th 2014   On 1st April 2014, 23:46:46 UTC, Magnitude 8.2 ea … Continue reading “2nd April 2014, earthquake off Chile (Updated:4th April 2014)”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-156","post","type-post","status-publish","format-standard","hentry","category-eq"],"_links":{"self":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/156"}],"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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/comments?post=156"}],"version-history":[{"count":1,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/156\/revisions"}],"predecessor-version":[{"id":157,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/156\/revisions\/157"}],"wp:attachment":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media?parent=156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/categories?post=156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/tags?post=156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}