Assessing the effectiveness of the shear-tensile-compressive model in earthquake source inversions: synthetic experiments and field application

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F24%3A00583510" target="_blank" >RIV/67985530:_____/24:00583510 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/24:00579689

Výsledek na webu

<a href="https://academic.oup.com/gji/article/236/1/161/7333972?login=true" target="_blank" >https://academic.oup.com/gji/article/236/1/161/7333972?login=true</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/gji/ggad425" target="_blank" >10.1093/gji/ggad425</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Assessing the effectiveness of the shear-tensile-compressive model in earthquake source inversions: synthetic experiments and field application

Popis výsledku v původním jazyce

As an alternative to the moment tensor (MT) model for earthquake sources, the shear-tensile- compressi ve (STC) model of fers a kinematic description of the source mechanism and leads to a more robust inversion problem. However, the premise of the source inversion based on STC is to ensure the accuracy of parameternκdefined as the ratio of the Lam ´e constants, κ= λ/μ, in a fault zone. In this study, we carry out a series of synthetic experiments using P -wave amplitudes in source mechanism inversions based on both the STC and MT models, and consider the influence of noise, the uncertainties in source locations and in the velocity model. We show that the nonlinear STC inversion with an appropriate value of κleads to more accurate result compared to the linear MT inversion. We also propose a new joint-STC inversion method to jointly invert for parameter κand the remaining parameters of the STC model (magnitude and the strik e, dip, rak e and slope angles). The results indicate that our proposed method yields robust results for both the parameter κand focal mechanisms. We apply our joint-STC inversion method to field microearthquake data observed in the West Bohemia region to validate some of the conclusions drawn from the synthetic experiments.

Název v anglickém jazyce

Assessing the effectiveness of the shear-tensile-compressive model in earthquake source inversions: synthetic experiments and field application

Popis výsledku anglicky

As an alternative to the moment tensor (MT) model for earthquake sources, the shear-tensile- compressi ve (STC) model of fers a kinematic description of the source mechanism and leads to a more robust inversion problem. However, the premise of the source inversion based on STC is to ensure the accuracy of parameternκdefined as the ratio of the Lam ´e constants, κ= λ/μ, in a fault zone. In this study, we carry out a series of synthetic experiments using P -wave amplitudes in source mechanism inversions based on both the STC and MT models, and consider the influence of noise, the uncertainties in source locations and in the velocity model. We show that the nonlinear STC inversion with an appropriate value of κleads to more accurate result compared to the linear MT inversion. We also propose a new joint-STC inversion method to jointly invert for parameter κand the remaining parameters of the STC model (magnitude and the strik e, dip, rak e and slope angles). The results indicate that our proposed method yields robust results for both the parameter κand focal mechanisms. We apply our joint-STC inversion method to field microearthquake data observed in the West Bohemia region to validate some of the conclusions drawn from the synthetic experiments.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10507 - Volcanology

Projekt

<a href="/cs/project/GA22-10747S" target="_blank" >GA22-10747S: Výpočet napětí a jeho časoprostorového rozložení z ohniskových mechanismů a seismických momentových tenzorů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Geophysical Journal International

ISSN

0956-540X

e-ISSN

1365-246X

Svazek periodika

236

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

161-173

Kód UT WoS článku

001098988900002

EID výsledku v databázi Scopus

2-s2.0-85177767882