Multi-Scale Rupture Growth With Alternating Directions in a Complex Fault Network During the 2023 South-Eastern Türkiye and Syria Earthquake Doublet

Ryo Okuwaki; Yuji Yagi; Tuncay Taymaz; Stephen P. Hicks

doi:10.1029/2023GL103480

Multi-Scale Rupture Growth With Alternating Directions in a Complex Fault Network During the 2023 South-Eastern Türkiye and Syria Earthquake Doublet

Ryo Okuwaki^*, Yuji Yagi, Tuncay Taymaz, Stephen P. Hicks

^*Bu çalışma için yazışmadan sorumlu yazar

Jeofizik Mühendisliği Bölümü

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

76 Atıf (Scopus)

Özet

A devastating doublet of earthquakes with moment magnitude M_W 7.9 and M_W 7.6 earthquakes contiguously occurred in SE Türkiye near the NW border of Syria. Here we perform a potency-density tensor inversion to simultaneously estimate rupture evolution and fault geometry for the doublet. We find the initial M_W 7.9 earthquake involved discrete episodes of supershear rupture and back-rupture propagation, and was triggered by initial rupture along a bifurcated splay of the East Anatolian Fault. The second M_W 7.6 event was triggered by the earlier M_W 7.9 event, and it involved more extensive supershear rupture along a favorably curved fault, and was likely stopped by geometric barriers at the fault ends. Our results highlight the multi-scale cascading rupture growth across the complex fault network that affects the diverse rupture geometries of the 2023 Türkiye earthquake doublet, contributing to the strong ground shaking and associated devastation.

Orijinal dil	İngilizce
Makale numarası	e2023GL103480
Dergi	Geophysical Research Letters
Hacim	50
Basın numarası	12
DOI'lar	https://doi.org/10.1029/2023GL103480
Yayın durumu	Yayınlandı - 28 Haz 2023

Bibliyografik not

Publisher Copyright:
© 2023. The Authors.

Finansman

We thank the editor Germán Prieto and the reviewer Erdinc Saygin and the anonymous reviewer for their thorough evaluations and providing constructive comments and suggestions. We also thank Ahmed Ettaf Elbanna, František Gallovič, and Jiří Zahradník for fruitful discussion. The facilities of IRIS Data Services, and specifically the IRIS Data Management Center, were used for access to waveforms, related metadata, and/or derived products used in this study. IRIS Data Services are funded through the Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation under Cooperative Support Agreement EAR‐1851048. We appreciate the Disaster and Emergency Management Presidency of Türkiye (AFAD) for providing an initial catalogue of aftershocks and phase‐arrival data acquired from their bulletin resources. This work was supported by JSPS Grant‐in‐Aid for Scientific Research (C) 19K04030 and 22K03751, JSPS Early‐Career Scientists 20K14570, and JSPS Grant‐in‐Aid for Special Purposes 22K21372. The authors declare no conflicts of interest relevant to this study.

Finansörler	Finansör numarası
National Science Foundation	EAR‐1851048
Japan Society for the Promotion of Science	22K21372, 20K14570, 19K04030, 22K03751

BM SKH

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10.1029/2023GL103480

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Link to publication in Scopus

Alıntı Yap

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title = "Multi-Scale Rupture Growth With Alternating Directions in a Complex Fault Network During the 2023 South-Eastern T{\"u}rkiye and Syria Earthquake Doublet",

abstract = "A devastating doublet of earthquakes with moment magnitude MW 7.9 and MW 7.6 earthquakes contiguously occurred in SE T{\"u}rkiye near the NW border of Syria. Here we perform a potency-density tensor inversion to simultaneously estimate rupture evolution and fault geometry for the doublet. We find the initial MW 7.9 earthquake involved discrete episodes of supershear rupture and back-rupture propagation, and was triggered by initial rupture along a bifurcated splay of the East Anatolian Fault. The second MW 7.6 event was triggered by the earlier MW 7.9 event, and it involved more extensive supershear rupture along a favorably curved fault, and was likely stopped by geometric barriers at the fault ends. Our results highlight the multi-scale cascading rupture growth across the complex fault network that affects the diverse rupture geometries of the 2023 T{\"u}rkiye earthquake doublet, contributing to the strong ground shaking and associated devastation.",

keywords = "complex fault geometry, earthquake, inversion, rupture process, teleseismic waves, triggering",

author = "Ryo Okuwaki and Yuji Yagi and Tuncay Taymaz and Hicks, {Stephen P.}",

note = "Publisher Copyright: {\textcopyright} 2023. The Authors.",

year = "2023",

month = jun,

day = "28",

doi = "10.1029/2023GL103480",

language = "English",

volume = "50",

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T1 - Multi-Scale Rupture Growth With Alternating Directions in a Complex Fault Network During the 2023 South-Eastern Türkiye and Syria Earthquake Doublet

AU - Okuwaki, Ryo

AU - Yagi, Yuji

AU - Taymaz, Tuncay

AU - Hicks, Stephen P.

PY - 2023/6/28

Y1 - 2023/6/28

N2 - A devastating doublet of earthquakes with moment magnitude MW 7.9 and MW 7.6 earthquakes contiguously occurred in SE Türkiye near the NW border of Syria. Here we perform a potency-density tensor inversion to simultaneously estimate rupture evolution and fault geometry for the doublet. We find the initial MW 7.9 earthquake involved discrete episodes of supershear rupture and back-rupture propagation, and was triggered by initial rupture along a bifurcated splay of the East Anatolian Fault. The second MW 7.6 event was triggered by the earlier MW 7.9 event, and it involved more extensive supershear rupture along a favorably curved fault, and was likely stopped by geometric barriers at the fault ends. Our results highlight the multi-scale cascading rupture growth across the complex fault network that affects the diverse rupture geometries of the 2023 Türkiye earthquake doublet, contributing to the strong ground shaking and associated devastation.

AB - A devastating doublet of earthquakes with moment magnitude MW 7.9 and MW 7.6 earthquakes contiguously occurred in SE Türkiye near the NW border of Syria. Here we perform a potency-density tensor inversion to simultaneously estimate rupture evolution and fault geometry for the doublet. We find the initial MW 7.9 earthquake involved discrete episodes of supershear rupture and back-rupture propagation, and was triggered by initial rupture along a bifurcated splay of the East Anatolian Fault. The second MW 7.6 event was triggered by the earlier MW 7.9 event, and it involved more extensive supershear rupture along a favorably curved fault, and was likely stopped by geometric barriers at the fault ends. Our results highlight the multi-scale cascading rupture growth across the complex fault network that affects the diverse rupture geometries of the 2023 Türkiye earthquake doublet, contributing to the strong ground shaking and associated devastation.

KW - complex fault geometry

KW - earthquake

KW - inversion

KW - rupture process

KW - teleseismic waves

KW - triggering

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U2 - 10.1029/2023GL103480

DO - 10.1029/2023GL103480

M3 - Article

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VL - 50

JO - Geophysical Research Letters

JF - Geophysical Research Letters

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M1 - e2023GL103480

ER -

Multi-Scale Rupture Growth With Alternating Directions in a Complex Fault Network During the 2023 South-Eastern Türkiye and Syria Earthquake Doublet

Özet

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Finansman

BM SKH

Belgeye Erişim

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