| 摘要: |
| 北京时间2022年6月10日1时28分四川阿坝州马尔康市(32.25°N,101.82°E)发生6.0级地震。中国地震台网中心于震后3min发布自动速报结果、震后约7min发布正式速报结果,同时联合多家单位启动地震应急产品产出工作,共产出震源参数、历史地震、地质构造、震源机制、余震精定位、推测烈度和震源破裂过程等9类应急产品,对于发震断层的孕震构造给出了初步约束。结果显示,本次地震发生在松岗断裂附近,位于青藏高原巴颜喀拉块体东部的阿坝次级地块;震源机制解表明该地震是一次走滑型事件,余震与主震性质整体一致。余震烈度速报推测极震区烈度达Ⅸ度,区域面积约70km2;Ⅷ度及以上区域面积约734km2,涉及7个乡。 |
| 关键词: 马尔康地震|地震速报|震源机制|地震烈度|破裂过程 |
| DOI： |
| 分类号:P315 |
| 基金项目:国家重点研发计划(2021YFC3000701)、国家自然科学基金(41704056)共同资助 |
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| Preliminary Analysis of Emergency Production and Source Parameters of the M6.0 Earthquake on June 10,2022 in Maerkang City,Sichuan Province |
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Zhang Jianyong, Dai Danqing, Yang Zhigao, Xi Nan, Deng Wenze, Xu Tairan, Sun Li
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China Earthquake Networks Center, Beijing 100045, China
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| Abstract: |
| At 01:28 on June 10,2022(Beijing time),an earthquake of magnitude 6.0 occurred in Maerkang city(32.25°N,101.82°E),Sichuan Province. The China Earthquake Early Warning Network released the first early warning results in 9.0 seconds after the earthquake,and released the automatic quick report results in 3 minutes after the earthquake. The official quick report results was released by China Earthquake Network Center in 7 minutes after the earthquake. Then,together with other institutes,the China Earthquake Network Center produced emergency production,including source parameters,historical earthquakes,seismic tectonics,focal mechanism,aftershock location,and estimated intensity,which gives a preliminary constraint on seismogenic structures of faults. The results show that the earthquake occurred in the Songgang fault zone,located in the Aba sub-block at the eastern part of the Bayan Har block on the Tibet plateau. The focal mechanism solutions indicate that the mainshock occurred on a strike-slip fault and the focal mechanism of the large aftershocks is similar to that of the mainshock. Based on the intensity rapid report,the intensity of the extreme earthquake area reaches Ⅸ degree,with a total area of about 70km2,and the total area of Ⅷ degree and above is about 734km2,which is from 7 towns involved. |
| Key words: The Maerkang earthquake|Seismic quick report|Focal mechanism|Seismic intensity|Rupture process |
