Slow rupture in a fluid-rich fault zone initiated the 2024 <i>M</i> <sub>w</sub> 7.5 Noto earthquake-Reference-Cited by-同舟云学术

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

Published:2024-08-23 Issue:6711 Volume:385 Page:866-871
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Ma Zhangfeng¹^ORCID,Zeng Hongyu¹²^ORCID,Luo Haipeng¹³^ORCID,Liu Zemin⁴^ORCID,Jiang Yu¹^ORCID,Aoki Yosuke⁵^ORCID,Wang Weitao⁴,Itoh Yuji⁵⁶^ORCID,Lyu Mingzhe²,Cui Yan⁷,Yun Sang-Ho¹²⁸^ORCID,Hill Emma M.¹²^ORCID,Wei Shengji¹²⁹^ORCID

Affiliation:

1. Earth Observatory of Singapore, Nanyang Technological University, Singapore.

2. Asian School of the Environment, Nanyang Technological University, Singapore.

3. Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China.

4. The Institute of Geophysics, China Earthquake Administration, Beijing, China.

5. Earthquake Research Institute, The University of Tokyo, Tokyo, Japan.

6. Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, Université Gustave Eiffel, ISTerre, Grenoble, France.

7. School of Earth Sciences and Engineering, Hohai University, Nanjing, China.

8. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore.

9. Key Laboratory of Deep Petroleum Intelligent Exploration and Development, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China.

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.

Publisher

American Association for the Advancement of Science (AAAS)

Link

https://www.science.org/doi/pdf/10.1126/science.ado5143

Reference71 articles.

1. Earthquake Research Institute University of Tokyo “2024 Noto Peninsula Earthquake ” research report updated 1 February 2024; https://www.eri.u-tokyo.ac.jp/eq/20465/.

2. Geospatial Information Authority of Japan “Coastline change caused by the 2024 Noto Peninsula Earthquake detected by ALOS-2 SAR satellite image (Jan. 4 2024)”; https://www.gsi.go.jp/uchusokuchi/uchusokuchi-e31001.html.

3. The Asahi Shimbun “Noto earthquake offered fresh lessons for nuke power safety ” 18 January 2024; https://www.asahi.com/ajw/articles/15117836.

4. The relationship between Late Cenozoic tectonic events and stress field and basin development in northeast Japan

5. Stress Map of Japan: Detailed Nationwide Crustal Stress Field Inferred From Focal Mechanism Solutions of Numerous Microearthquakes

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