Počet záznamů: 1

Seismically active column and volcanic plumbing system beneath the island arc of the Izu-Bonin subduction zone

  1. 1.
    0332503 - GFU-E 2010 RIV GB eng J - Článek v odborném periodiku
    Špičák, Aleš - Vaněk, Jiří - Hanuš, Václav
    Seismically active column and volcanic plumbing system beneath the island arc of the Izu-Bonin subduction zone.
    Geophysical Journal International. Roč. 179, č. 3 (2009), s. 1301-1312 ISSN 0956-540X
    Výzkumný záměr: CEZ:AV0Z30120515
    Klíčová slova: seismicity and tectonics * volcano seismology * subduction zone processes * volcanic arc processes * magma migration and fragmentation * Pacific Ocean
    Kód oboru RIV: DC - Seismologie, vulkanologie a struktura Země
    Impakt faktor: 2.435, rok: 2009

    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.
    Trvalý link: http://hdl.handle.net/11104/0177749