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Toward understanding subtle instrumentation effects associated with weak seismic events in the near field
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SYSNO ASEP 0339444 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Toward understanding subtle instrumentation effects associated with weak seismic events in the near field Tvůrce(i) Zahradník, J. (CZ)
Plešinger, Axel (GFU-E)Zdroj.dok. Bulletin of the Seismological Society of America. - : Seismological Society of America - ISSN 0037-1106
Roč. 100, č. 1 (2010), s. 59-73Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova instrumentation effects ; broadband seismology ; weak earthquakes Vědní obor RIV DC - Seismologie, vulkanologie a struktura Země CEP IAA300120911 GA AV ČR - Akademie věd CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000274149900003 DOI 10.1785/0120090087 Anotace Broadband observations of small earthquakes at short epicentral distances reveal a mixture of near-field effects and instrumental artifacts. We investigated these phenomena at a station equipped with an STS-2 and CMG-40T sensor situated almost above shallow M 3.0 to 3.8 events (peak ground acceleration 2 x 10(-1) m/sec(2)). The horizontal components were systematically accompanied by tiltlike disturbances, and the tilt obtained from the STS-2 records exceeded more than 10 times the values predicted by the source model. We also observed a so far uncommonly recognized type of disturbance, whose shape is the first derivative of the tiltlike disturbance. The most likely explanation seems to be clipping of high-frequency signal peaks within the sensor system. A computational model of a broadband feedback velocimeter as a linear dynamic system with saturation proved this interpretation on a qualitative level. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2010
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