Slow rupture in a fluid-rich fault zone initiated the 2024 Mw 7.5 Noto earthquake

Zhangfeng Ma; Hongyu Zeng; Haipeng Luo; Zemin Liu; Yu Jiang; Yosuke Aoki; Weitao Wang; Yuji Itoh; Mingzhe Lyu; Yan Cui; Sang Ho Yun; Emma M. Hill; Shengji Wei

doi:10.1126/science.ado5143

Slow rupture in a fluid-rich fault zone initiated the 2024 M_w 7.5 Noto earthquake

Zhangfeng Ma, Hongyu Zeng, Haipeng Luo, Zemin Liu, Yu Jiang, Yosuke Aoki, Weitao Wang, Yuji Itoh, Mingzhe Lyu, Yan Cui, Sang Ho Yun, Emma M. Hill, Shengji Wei

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

The 2024 moment magnitude 7.5 Noto Peninsula (Japan) earthquake caused devastation to communities and was generated by a complex rupture process. Using space geodetic and seismic observations, we have shown that the event deformed the peninsula with a peak uplift reaching 5 meters at the west coast. Shallow slip exceeded 10 meters on an offshore fault. Peak stress drop was greater than 10 megapascals. This devastating event began with a slow rupture propagation lasting 15 to 20 seconds near its hypocenter, where seismic swarms had surged since 2020 because of lower-crust fluid supply. The slow start was accompanied by intense high-frequency seismic radiation. These observations suggest a distinct coseismic slip mode reflecting high heterogeneity in fault properties within a fluid-rich fault zone.

Original language	English
Pages (from-to)	866-871
Number of pages	6
Journal	Science
Volume	385
Issue number	6711
DOIs	https://doi.org/10.1126/science.ado5143
Publication status	Published - Aug 23 2024
Externally published	Yes

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title = "Slow rupture in a fluid-rich fault zone initiated the 2024 Mw 7.5 Noto earthquake",

abstract = "The 2024 moment magnitude 7.5 Noto Peninsula (Japan) earthquake caused devastation to communities and was generated by a complex rupture process. Using space geodetic and seismic observations, we have shown that the event deformed the peninsula with a peak uplift reaching 5 meters at the west coast. Shallow slip exceeded 10 meters on an offshore fault. Peak stress drop was greater than 10 megapascals. This devastating event began with a slow rupture propagation lasting 15 to 20 seconds near its hypocenter, where seismic swarms had surged since 2020 because of lower-crust fluid supply. The slow start was accompanied by intense high-frequency seismic radiation. These observations suggest a distinct coseismic slip mode reflecting high heterogeneity in fault properties within a fluid-rich fault zone.",

author = "Zhangfeng Ma and Hongyu Zeng and Haipeng Luo and Zemin Liu and Yu Jiang and Yosuke Aoki and Weitao Wang and Yuji Itoh and Mingzhe Lyu and Yan Cui and Yun, {Sang Ho} and Hill, {Emma M.} and Shengji Wei",

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T1 - Slow rupture in a fluid-rich fault zone initiated the 2024 Mw 7.5 Noto earthquake

AU - Ma, Zhangfeng

AU - Zeng, Hongyu

AU - Luo, Haipeng

AU - Liu, Zemin

AU - Jiang, Yu

AU - Aoki, Yosuke

AU - Wang, Weitao

AU - Itoh, Yuji

AU - Lyu, Mingzhe

AU - Cui, Yan

AU - Yun, Sang Ho

AU - Hill, Emma M.

AU - Wei, Shengji

PY - 2024/8/23

Y1 - 2024/8/23

N2 - The 2024 moment magnitude 7.5 Noto Peninsula (Japan) earthquake caused devastation to communities and was generated by a complex rupture process. Using space geodetic and seismic observations, we have shown that the event deformed the peninsula with a peak uplift reaching 5 meters at the west coast. Shallow slip exceeded 10 meters on an offshore fault. Peak stress drop was greater than 10 megapascals. This devastating event began with a slow rupture propagation lasting 15 to 20 seconds near its hypocenter, where seismic swarms had surged since 2020 because of lower-crust fluid supply. The slow start was accompanied by intense high-frequency seismic radiation. These observations suggest a distinct coseismic slip mode reflecting high heterogeneity in fault properties within a fluid-rich fault zone.

AB - The 2024 moment magnitude 7.5 Noto Peninsula (Japan) earthquake caused devastation to communities and was generated by a complex rupture process. Using space geodetic and seismic observations, we have shown that the event deformed the peninsula with a peak uplift reaching 5 meters at the west coast. Shallow slip exceeded 10 meters on an offshore fault. Peak stress drop was greater than 10 megapascals. This devastating event began with a slow rupture propagation lasting 15 to 20 seconds near its hypocenter, where seismic swarms had surged since 2020 because of lower-crust fluid supply. The slow start was accompanied by intense high-frequency seismic radiation. These observations suggest a distinct coseismic slip mode reflecting high heterogeneity in fault properties within a fluid-rich fault zone.

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Slow rupture in a fluid-rich fault zone initiated the 2024 M_w 7.5 Noto earthquake

Abstract

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