Disputable non-double-couple mechanisms of several strong earthquakes: second-degree moment approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F13%3A00396790" target="_blank" >RIV/67985530:_____/13:00396790 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1785/0120130014" target="_blank" >http://dx.doi.org/10.1785/0120130014</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1785/0120130014" target="_blank" >10.1785/0120130014</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Disputable non-double-couple mechanisms of several strong earthquakes: second-degree moment approach

Popis výsledku v původním jazyce

The earthquake source mechanism (description of the geometry of the source and its strength in terms of forces equivalent to rupturing of the rock mass) is routinely modeled as a moment tensor (MT) describing the earthquake focus as a point. However, sometimes this approximation is not satisfied, and seismic radiation keeps the directivity due to the finite extent of the source. Inversion into the MT then may yield a biased mechanism. Synthetic study in the Adamová and Šílený (2010) demonstrated the appearance of spurious non-double-couple components in the mechanism even for a pure double-couple (DC) source. Their method was designed to reduce the spurious source components by using the second-degree moments to evaluate their contribution into the records and subtract it from the data. Here we applied the procedure to five moderate to large regional events with large nonshear components. They are mostly located on large tectonic faults where predominantly pure shear slip is expected.

Název v anglickém jazyce

Disputable non-double-couple mechanisms of several strong earthquakes: second-degree moment approach

Popis výsledku anglicky

The earthquake source mechanism (description of the geometry of the source and its strength in terms of forces equivalent to rupturing of the rock mass) is routinely modeled as a moment tensor (MT) describing the earthquake focus as a point. However, sometimes this approximation is not satisfied, and seismic radiation keeps the directivity due to the finite extent of the source. Inversion into the MT then may yield a biased mechanism. Synthetic study in the Adamová and Šílený (2010) demonstrated the appearance of spurious non-double-couple components in the mechanism even for a pure double-couple (DC) source. Their method was designed to reduce the spurious source components by using the second-degree moments to evaluate their contribution into the records and subtract it from the data. Here we applied the procedure to five moderate to large regional events with large nonshear components. They are mostly located on large tectonic faults where predominantly pure shear slip is expected.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DC - Seismologie, vulkanologie a struktura Země

OECD FORD obor

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Projekt

<a href="/cs/project/GAP210%2F10%2F0296" target="_blank" >GAP210/10/0296: Modelování zemětřesného ohniska s využitím momentů druhého stupně.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Bulletin of the Seismological Society of America

ISSN

0037-1106

e-ISSN

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Svazek periodika

103

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

2836-2849

Kód UT WoS článku

000324986700021

EID výsledku v databázi Scopus

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