Complex fault geometry controls dynamic rupture of the 2021 Mw7.4 Maduo earthquake, NE Tibetan Plateau

Yuan, Jie; Li, Yujiang

doi:10.1016/j.tecto.2023.230105

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…Previous studies focused on analyzing the static, kinematic, and dynamic source properties of the Maduo earthquake using geodetic, teleseismic, and field data (Gao et al, 2021;Jin & Fialko, 2021;Ren et al, 2021;L. He et al, 2021;Guo et al, 2021;Pan et al, 2022;Yue et al, 2022;J. Yuan & Li, 2023).…”

Section: Introductionmentioning

confidence: 99%

Non-typical supershear rupture: fault heterogeneity and segmentation govern unilateral supershear and cascading multi-fault rupture in the 2021 Mw 7.4 Maduo Earthquake

Hayek,

Marchandon,

et al. 2024

Preprint

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Previous geodetic and teleseismic observations of the 2021 Mw 7.4 Maduo earthquake imply surprising but difficult-to-constrain complexity, including rupture across multiple fault segments and supershear rupture. Here, we present an integrated analysis of multi-fault 3D dynamic rupture models, high-resolution optical correlation analysis, and joint optical-InSAR slip inversion. Our preferred model, validated by the teleseismic multi-peak moment rate release, includes unilateral eastward double-onset supershear speeds and cascading rupture dynamically triggering two adjacent fault branches. We propose that pronounced along-strike variation in fracture energy, complex fault geometries, and multi-scale variable prestress drives this event's complex rupture dynamics. We illustrate how supershear transition has signatures in modeled and observed off-fault deformation. Our study opens new avenues to combine observations and models to better understand complex earthquake dynamics, including local and potentially repeating supershear episodes across immature faults or under heterogeneous stress and strength conditions, which are potentially not unusual.

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Section: Introductionmentioning

confidence: 99%

Non-typical supershear rupture: fault heterogeneity and segmentation govern unilateral supershear and cascading multi-fault rupture in the 2021 Mw 7.4 Maduo Earthquake

Hayek,

Marchandon,

et al. 2024

Preprint

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Mechanism of crustal deformation around the Lajishan-Jishishan Tectonic Belt, NE Tibet, and implications for occurrence of the 2023 Jishishan MS 6.2 earthquake

Liu,

Gan,

et al. 2025

Journal of Asian Earth Sciences

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Non‐Typical Supershear Rupture: Fault Heterogeneity and Segmentation Govern Unilateral Supershear and Cascading Multi‐Fault Rupture in the 2021 Mw ${M}_{w}$7.4 Maduo Earthquake

Hayek,

Marchandon,

et al. 2024

Geophysical Research Letters

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Previous geodetic and teleseismic observations of the 2021 7.4 Maduo earthquake imply surprising but difficult‐to‐constrain complexity, including rupture across multiple fault segments and supershear rupture. Here, we present an integrated analysis of multi‐fault 3D dynamic rupture models, high‐resolution optical correlation analysis, and joint optical‐InSAR slip inversion. Our preferred model, validated by the teleseismic multi‐peak moment rate release, includes unilateral eastward double‐onset supershear speeds and cascading rupture dynamically triggering two adjacent fault branches. We propose that pronounced along‐strike variation in fracture energy, complex fault geometries, and multi‐scale variable prestress drives this event's complex rupture dynamics. We illustrate how supershear transition has signatures in modeled and observed off‐fault deformation. Our study opens new avenues to combine observations and models to better understand complex earthquake dynamics, including local and potentially repeating supershear episodes across immature faults or under heterogeneous stress and strength conditions, which are potentially not unusual.

show abstract

Complex fault geometry controls dynamic rupture of the 2021 Mw7.4 Maduo earthquake, NE Tibetan Plateau

Cited by 3 publications

References 37 publications

Non-typical supershear rupture: fault heterogeneity and segmentation govern unilateral supershear and cascading multi-fault rupture in the 2021 Mw 7.4 Maduo Earthquake

Non-typical supershear rupture: fault heterogeneity and segmentation govern unilateral supershear and cascading multi-fault rupture in the 2021 Mw 7.4 Maduo Earthquake

Mechanism of crustal deformation around the Lajishan-Jishishan Tectonic Belt, NE Tibet, and implications for occurrence of the 2023 Jishishan MS 6.2 earthquake

Non‐Typical Supershear Rupture: Fault Heterogeneity and Segmentation Govern Unilateral Supershear and Cascading Multi‐Fault Rupture in the 2021 Mw ${M}_{w}$7.4 Maduo Earthquake

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