Počet záznamů: 1
Determination and uncertainty of moment tensors for microearthquakes at Okmok Volcano, Alaska
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SYSNO ASEP 0379890 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Determination and uncertainty of moment tensors for microearthquakes at Okmok Volcano, Alaska Tvůrce(i) Pesicek, J. D. (US)
Šílený, Jan (GFU-E) ORCID, RID
Prejean, S. G. (US)
Thurber, C. H. (US)Zdroj.dok. Geophysical Journal International - ISSN 0956-540X
Roč. 190, č. 3 (2012), s. 1689-1709Poč.str. 21 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova earthquake source observations ; volcano seismology ; body waves Vědní obor RIV DC - Seismologie, vulkanologie a struktura Země CEP GAP210/12/2235 GA ČR - Grantová agentura ČR CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000307571100029 DOI https://doi.org/10.1111/j.1365-246X.2012.05574.x Anotace Efforts to determine general moment tensors (MTs) for microearthquakes in volcanic areas are often hampered by small seismic networks, which can lead to poorly constrained hypocentres and inadequate modelling of seismic velocity heterogeneity. In addition, noisy seismic signals can make it difficult to identify phase arrivals correctly for small magnitude events. However, small volcanic earthquakes can have source mechanisms that deviate from brittle double-couple shear failure due to magmatic and/or hydrothermal processes. Thus, determining reliable MTs in such conditions is a challenging but potentially rewarding pursuit. We pursued such a goal at Okmok Volcano, Alaska, which erupted recently in 1997 and in 2008. The Alaska Volcano Observatory operates a seismic network of 12 stations at Okmok and routinely catalogues recorded seismicity. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2013
Počet záznamů: 1