Sensitivity of stress inversion of focal mechanisms to pore pressure changes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F16%3A00463543" target="_blank" >RIV/67985530:_____/16:00463543 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/2016GL070145" target="_blank" >http://dx.doi.org/10.1002/2016GL070145</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/2016GL070145" target="_blank" >10.1002/2016GL070145</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sensitivity of stress inversion of focal mechanisms to pore pressure changes

Popis výsledku v původním jazyce

We investigate the sensitivity of stress inversion from focal mechanisms to pore pressure changes. Synthetic tests reveal that pore pressure variations can cause apparent changes in the retrieved stress ratio R relating the magnitude of the intermediate principal stress with respect to the maximum and minimum principal stresses. Pore pressure and retrieved R are negatively correlated when R is low (R<0.6). The spurious variations in retrieved R are suppressed when R>0.6. This observation is independent of faulting style, and it may be related to different performance of the fault plane selection criterion and variability in orientation of activated faults under different pore pressures. Our findings from synthetic data are supported by results obtained from induced seismicity at The Geysers geothermal field. Therefore, the retrieved stress ratio variations can be utilized for monitoring pore pressure changes at seismogenic depth in stress domains with overall low R.

Název v anglickém jazyce

Sensitivity of stress inversion of focal mechanisms to pore pressure changes

Popis výsledku anglicky

We investigate the sensitivity of stress inversion from focal mechanisms to pore pressure changes. Synthetic tests reveal that pore pressure variations can cause apparent changes in the retrieved stress ratio R relating the magnitude of the intermediate principal stress with respect to the maximum and minimum principal stresses. Pore pressure and retrieved R are negatively correlated when R is low (R<0.6). The spurious variations in retrieved R are suppressed when R>0.6. This observation is independent of faulting style, and it may be related to different performance of the fault plane selection criterion and variability in orientation of activated faults under different pore pressures. Our findings from synthetic data are supported by results obtained from induced seismicity at The Geysers geothermal field. Therefore, the retrieved stress ratio variations can be utilized for monitoring pore pressure changes at seismogenic depth in stress domains with overall low R.

Druh

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

CEP obor

DC - Seismologie, vulkanologie a struktura Země

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Geophysical Research Letters

ISSN

0094-8276

e-ISSN

—

Svazek periodika

43

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

8441-8450

Kód UT WoS článku

000384443800014

EID výsledku v databázi Scopus

2-s2.0-84983440063