{"title":"2024年12月5日Mw7.0级近海门多西诺角地震破裂过程","authors":"F. F. Pollitz, K. A. Guns, C. E. Yoon","doi":"10.1029/2025GL115613","DOIUrl":null,"url":null,"abstract":"<p>The Mw7.0 December 5, 2024 Offshore Cape Mendocino earthquake ruptured a <span></span><math>\n <semantics>\n <mrow>\n <mo>∼</mo>\n <mn>60</mn>\n </mrow>\n <annotation> ${\\sim} 60$</annotation>\n </semantics></math> km long portion of the east-west trending Mendocino fault zone (MFZ). In order to clarify the rupture process, we assemble three-component seismograms from regional seismic stations, horizontal coseismic displacement vectors derived from Global Navigation Satellite System (GNSS) time series, and a Sentinel-1 ascending interferogram. These data are interpreted with a model of slip distributed on two vertical fault planes representative of the eastern MFZ and spanning the <span></span><math>\n <semantics>\n <mrow>\n <mo>∼</mo>\n <mn>70</mn>\n </mrow>\n <annotation> ${\\sim} 70$</annotation>\n </semantics></math> km length of the aftershock zone. Assuming right-lateral strike slip, we find that the rupture initiates in the oceanic mantle at <span></span><math>\n <semantics>\n <mrow>\n <mn>20</mn>\n <mo>−</mo>\n <mn>30</mn>\n </mrow>\n <annotation> $20-30$</annotation>\n </semantics></math> km depth and proceeds unilaterally updip and toward the east. Early aftershocks locate adjacent to the peak slip areas, tracking the coseismic rupture propagation from oceanic mantle to shallower depth and implying a significant role of static stress transfer in driving aftershocks in an ocean plate environment.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 14","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115613","citationCount":"0","resultStr":"{\"title\":\"Rupture Process of the Mw7.0 December 5, 2024 Offshore Cape Mendocino Earthquake\",\"authors\":\"F. F. Pollitz, K. A. Guns, C. E. Yoon\",\"doi\":\"10.1029/2025GL115613\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The Mw7.0 December 5, 2024 Offshore Cape Mendocino earthquake ruptured a <span></span><math>\\n <semantics>\\n <mrow>\\n <mo>∼</mo>\\n <mn>60</mn>\\n </mrow>\\n <annotation> ${\\\\sim} 60$</annotation>\\n </semantics></math> km long portion of the east-west trending Mendocino fault zone (MFZ). In order to clarify the rupture process, we assemble three-component seismograms from regional seismic stations, horizontal coseismic displacement vectors derived from Global Navigation Satellite System (GNSS) time series, and a Sentinel-1 ascending interferogram. These data are interpreted with a model of slip distributed on two vertical fault planes representative of the eastern MFZ and spanning the <span></span><math>\\n <semantics>\\n <mrow>\\n <mo>∼</mo>\\n <mn>70</mn>\\n </mrow>\\n <annotation> ${\\\\sim} 70$</annotation>\\n </semantics></math> km length of the aftershock zone. Assuming right-lateral strike slip, we find that the rupture initiates in the oceanic mantle at <span></span><math>\\n <semantics>\\n <mrow>\\n <mn>20</mn>\\n <mo>−</mo>\\n <mn>30</mn>\\n </mrow>\\n <annotation> $20-30$</annotation>\\n </semantics></math> km depth and proceeds unilaterally updip and toward the east. Early aftershocks locate adjacent to the peak slip areas, tracking the coseismic rupture propagation from oceanic mantle to shallower depth and implying a significant role of static stress transfer in driving aftershocks in an ocean plate environment.</p>\",\"PeriodicalId\":12523,\"journal\":{\"name\":\"Geophysical Research Letters\",\"volume\":\"52 14\",\"pages\":\"\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2025-07-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL115613\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geophysical Research Letters\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1029/2025GL115613\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geophysical Research Letters","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1029/2025GL115613","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Rupture Process of the Mw7.0 December 5, 2024 Offshore Cape Mendocino Earthquake
The Mw7.0 December 5, 2024 Offshore Cape Mendocino earthquake ruptured a km long portion of the east-west trending Mendocino fault zone (MFZ). In order to clarify the rupture process, we assemble three-component seismograms from regional seismic stations, horizontal coseismic displacement vectors derived from Global Navigation Satellite System (GNSS) time series, and a Sentinel-1 ascending interferogram. These data are interpreted with a model of slip distributed on two vertical fault planes representative of the eastern MFZ and spanning the km length of the aftershock zone. Assuming right-lateral strike slip, we find that the rupture initiates in the oceanic mantle at km depth and proceeds unilaterally updip and toward the east. Early aftershocks locate adjacent to the peak slip areas, tracking the coseismic rupture propagation from oceanic mantle to shallower depth and implying a significant role of static stress transfer in driving aftershocks in an ocean plate environment.
期刊介绍：
Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.
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