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

Result code in 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>

Alternative codes found

RIV/67985831:_____/24:00579689

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10507 - Volcanology

Project

<a href="/en/project/GA22-10747S" target="_blank" >GA22-10747S: Inversion of focal mechanisms and seismic moment tensors for stress and its spatiotemporal variation</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Geophysical Journal International

ISSN

0956-540X

e-ISSN

1365-246X

Volume of the periodical

236

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

161-173

UT code for WoS article

001098988900002

EID of the result in the Scopus database

2-s2.0-85177767882