Stress and faulting pattern in the Bam Region, SE Iran, detected by fault instability criterion and fry method

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F24%3A00583509" target="_blank" >RIV/67985530:_____/24:00583509 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s00024-023-03398-5" target="_blank" >https://link.springer.com/article/10.1007/s00024-023-03398-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00024-023-03398-5" target="_blank" >10.1007/s00024-023-03398-5</a>

Result language

angličtina

Original language name

Stress and faulting pattern in the Bam Region, SE Iran, detected by fault instability criterion and fry method

Original language description

In this study, we determine the stress release from the 2003 Bam earthquake (Mw 6.6) by applying the stress inversion technique to focal mechanisms of 199 aftershocks. There is no evidence of significant surface faulting that can be used to study the faulting pattern of the Bam fault zone. Therefore, we applied two independent methods for identifying the faulting pattern in this zone: the instability criterion based on the analysis of orientations of nodal planes of focal mechanisms with respect to the regional stress, and the Fry method based on the analysis of spatial clustering of aftershock foci. The results show that the fault associated with the 2003 Bam earthquake is well oriented for shearing under the present-day regional stress. We identified four sets of faults with a close angular relation to the maximum horizontal compression (SHmax) that have been (re)activated. These faults include strike-slip (right lateral and left lateral), thrust, and normal faults that are oriented approximately oblique, perpendicular, and parallel relative to the SHmax, respectively. The direction of the SHmax is N31 degrees E. Based on the results, we propose to apply the instability criterion and the Fry method to seismic data as two valuable and independent techniques in order to constrain the kinematic and active faulting in the area.

Czech name

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Czech description

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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

Pure and Applied Geophysics

ISSN

0033-4553

e-ISSN

1420-9136

Volume of the periodical

181

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

219-231

UT code for WoS article

001132382700002

EID of the result in the Scopus database

2-s2.0-85180834219