Počet záznamů: 1
Microearthquake mechanism from wave amplitudes recorded by a close-to-surface seismic array at Ocnele Mari, Romania
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SYSNO ASEP 0428783 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Microearthquake mechanism from wave amplitudes recorded by a close-to-surface seismic array at Ocnele Mari, Romania Tvůrce(i) Jechumtálová, Zuzana (GFU-E) ORCID, RID
Šílený, Jan (GFU-E) ORCID, RID
Trifu, C.-I. (CA)Zdroj.dok. Geophysical Journal International - ISSN 0956-540X
Roč. 197, č. 3 (2014), s. 1608-1626Poč.str. 19 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova inverse theory ; earthquake source observation ; computational seismology ; fractures and faults ; mechanic, theory, and modelling Vědní obor RIV DC - Seismologie, vulkanologie a struktura Země CEP GAP210/10/1728 GA ČR - Grantová agentura ČR GAP210/12/2235 GA ČR - Grantová agentura ČR Institucionální podpora GFU-E - RVO:67985530 UT WOS 000337041100027 DOI 10.1093/gji/ggu029 Anotace The resolution of event mechanism is investigated in terms of the unconstrained moment tensor (MT) source model and the shear-tensile crack (STC) source model representing a slip along the fault with an off-plane component. Data are simulated as recorded by the actual seismic array installed at Ocnele Mari (Romania), where sensors are placed in shallow boreholes. Noise is included as superimposed on synthetic data, and the analysis explores how the results are influenced (i) by data recorded by the complete seismic array compared to that provided by the subarray of surface sensors, (ii) by using three- or one-component sensors and (iii) by inverting P- and S-wave amplitudes versus P-wave amplitudes only. The orientation of the pure shear fracture component is resolved almost always well. On the other hand, the noise increase distorts the non-double-couple components (non-DC) of the MT unless a highquality data set is available. The STC source model yields considerably less spurious non-shear fracture components. Incorporating recordings at deeper sensors in addition to those obtained from the surface ones allows for the processing of noisier data. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2015
Počet záznamů: 1