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\begin{document}

\title{Coseismic rupture model and tectonic implications of January 7, 2022,
Menyuan Mw 6.6 earthquake constraints from InSAR observation and field
investigation}



\author[1]{Yongsheng Li}%
\author[2]{Wenliang Jiang}%
\author[1]{Yujiang Li}%
\author[3]{Wenhao Shen}%
\author[1]{Zhongtai He}%
\author[4]{Bingquan Li}%
\author[5]{Qiang Li}%
\author[2]{Qisong Jiao}%
\author[2]{Yunfeng Tian}%
\affil[1]{National Institute of Natural Hazards, Ministry of Emergency Management of China}%
\affil[2]{Institute of Crustal Dynamics, China Earthquake Administration}%
\affil[3]{Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration}%
\affil[4]{China University of Geoscience}%
\affil[5]{National Institute of Natural Hazards}%


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  \date{May 27, 2024}


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\begin{abstract}
A Mw 6.6 earthquake struck Menyuan, Qinghai, China, on January 7, 2022.
To determine the rupture parameters and the seismogenic environment, we
resolve the optimal rupture parameters and discuss the tectonic
implications of this earthquake event. The Coseismic InSAR deformation
maps suggested a maximum of \textasciitilde{}80 cm distributed in the
light-of-sight direction of the satellite on the southern side of the
fault and a maximum of \textasciitilde{}70 cm on the northern side. We
further estimated the focal mechanism by building a two-segment
sinistral strike-slip fault model. The best-fitting solution emphasized
that the 2022 Menyuan earthquake ruptured at the junction of the
Tuolaishan fault and the Lenglongling fault. Both rupturing faults were
dominated by the sinistral strike-slip, and the main slip was
concentrated at the shallow part of the rupture plane. The latter is the
main rupture segment with a strike of 106\{degree sign\} and a dip of
86\{degree sign\}. The slip has mainly occurred at depths of 0-8 km, and
the rupture was exposed to the surface. The maximum slip reached
\textasciitilde{}3.5 m, which was mainly distributed at a depth of 4 km.
Jointed analysis of optimal slip model, relocated aftershocks, Coulomb
stress change, and field observation suggested that the strain energy in
Tuolaishan fault may not be fully released and needs further attention.
Moreover, the 2022 Mw6.6 Menyuan earthquake caused a significant stress
loading effect on the western Tuolaishan fault and eastern Lenglongling
fault, which implied that the 2022 event had strengthened the seismic
risk in these regions.%
\end{abstract}%



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\textbf{Hosted file}

\verb`essoar.10510772.1.docx`  available at \url{https://authorea.com/users/540122/articles/600129-coseismic-rupture-model-and-tectonic-implications-of-january-7-2022-menyuan-mw-6-6-earthquake-constraints-from-insar-observation-and-field-investigation}

\textbf{Hosted file}

\verb`2022 menyuan earthquake_suppinfo_word_oct10_21.docx`  available at \url{https://authorea.com/users/540122/articles/600129-coseismic-rupture-model-and-tectonic-implications-of-january-7-2022-menyuan-mw-6-6-earthquake-constraints-from-insar-observation-and-field-investigation}

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