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Seismically active column and volcanic plumbing system beneath the island arc of the Izu-Bonin subduction zone
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SYSNO ASEP 0332503 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Seismically active column and volcanic plumbing system beneath the island arc of the Izu-Bonin subduction zone Author(s) Špičák, Aleš (GFU-E) ORCID, RID
Vaněk, Jiří (GFU-E) RID
Hanuš, Václav (GFU-E)Source Title Geophysical Journal International - ISSN 0956-540X
Roč. 179, č. 3 (2009), s. 1301-1312Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords seismicity and tectonics ; volcano seismology ; subduction zone processes ; volcanic arc processes ; magma migration and fragmentation ; Pacific Ocean Subject RIV DC - Siesmology, Volcanology, Earth Structure CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000271634300004 DOI 10.1111/j.1365-246X.2009.04375.x Annotation A detailed spatio-temporal analysis of teleseismic earthquake occurrence (mb > 4.0) along the convergent margin of the Izu-Bonin-Mariana arc system reveals an anomalously high concentration of events between 27° and 30.5°N, beneath a chain of seamounts between Tori-shima and Nishino-shima volcanoes. This seismicity is dominated by the 1985/1986 earthquake swarm represented in the Engdahl-van der Hilst-Buland database by 146 earthquakes in the body wave magnitude range 4.3-5.8 and focal depth range 1-100 km. The epicentral cluster of the swarm is elongated parallel to the volcanic chain. Available focal mechanisms are consistent with an extensional tectonic regime and reveal nodal planes with azimuths close to that of the epicentral cluster. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2010
Number of the records: 1