Fault plane picking from focal mechanisms in reverse faulting stress: Application to the Mw6.9 Boumerdes (Algeria) earthquake sequence

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F22%3A00562033" target="_blank" >RIV/67985530:_____/22:00562033 - isvavai.cz</a>
Alternative codes found
RIV/67985831:_____/22:00562764
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1464343X22002813" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1464343X22002813</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jafrearsci.2022.104729" target="_blank" >10.1016/j.jafrearsci.2022.104729</a>

Result language
angličtina
Original language name
Fault plane picking from focal mechanisms in reverse faulting stress: Application to the Mw6.9 Boumerdes (Algeria) earthquake sequence
Original language description
Identification of the fault plane from two nodal planes of the focal mechanism is, in general, ambiguous. This problem is commonly solved using other constraints provided by tectonic, geological or seismic studies. In this paper, we evaluate the probability of identifying the fault plane using knowledge of stress field. We employ two alternative methods: (1) the slip angle method (SA), and (2) the highest instability method (IS). First, the efficiency of the methods was tested on synthetic data consisting of focal mechanisms compatible with a reverse stress regime. The tests revealed that the fraction of faults correctly picked by the IS method is higher than that of the SA method, particularly for large noise values. Second, the methods were applied to the aftershocks of the Boumerdes (Algeria) earthquake of May 21, 2003. This application showed that when taking into account the focal solutions for which the fault planes are determined using the IS method with a high probability, we observe consistency between the selected faults and the tectonics of the study area.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - 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
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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