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Seismic network calibration for retrieving accurate moment tensors
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SYSNO ASEP 0381313 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Seismic network calibration for retrieving accurate moment tensors Author(s) Davi, Rosalia (GFU-E)
Vavryčuk, Václav (GFU-E) ORCID, RIDSource Title Bulletin of the Seismological Society of America. - : Seismological Society of America - ISSN 0037-1106
Roč. 102, č. 6 (2012), s. 2491-2506Number of pages 16 s. Publication form Print - P Language eng - English Country US - United States Keywords earthquake source parameters ; West Bohemia swarm ; inversion Subject RIV DC - Siesmology, Volcanology, Earth Structure R&D Projects IAA300120801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GAP210/12/1491 GA ČR - Czech Science Foundation (CSF) LM2010008 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000311790000017 DOI 10.1785/0120120344 Annotation We present a method for calibrating seismic networks in order to retrieve highly accurate seismic moment tensors. The method is based on a joint inversion of large datasets of earthquakes for moment tensors and for amplifications of the network stations, which encompass the instrumental amplifications of sensors and the gain factor of the acquisition system, as well as the local site effects neglected in modeling of Green’s functions. The method is capable of detecting the reverse polarity of sensors, incorrect orientation of sensors, or anomalous site effects caused by local geological conditions at individual stations. The robustness and accuracy of the method are tested on synthetic data with different noise levels, station configurations, and a variety of focal mechanisms. The numerical modeling confirms that the inversion code works well and yields robust results. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2013
Number of the records: 1