Slow rupture in a fluid-rich fault zone initiated the 2024 Mw 7.5 Noto earthquake.
Science
; 385(6711): 866-871, 2024 Aug 23.
Article
en En
| MEDLINE
| ID: mdl-38963875
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.
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MEDLINE
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Revista:
Science
Año:
2024
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Article
País de afiliación:
Singapur