2022年6月10日四川马尔康6.0级地震应急产品及震源参数初步分析  

Preliminary Analysis of Emergency Production and Source Parameters of the M6.0 Earthquake on June 10,2022 in Maerkang City,Sichuan Province

作　　者：张建勇 戴丹青 杨志高[1] 席楠[1] 邓文泽 徐泰然 孙丽[1] Zhang Jianyong;Dai Danqing;Yang Zhigao;Xi Nan;Deng Wenze;Xu Tairan;Sun Li(China Earthquake Networks Center,Beijing 100045,China)

机构地区：[1]中国地震台网中心,北京100045

出　　处：《中国地震》2022年第2期370-382,共13页Earthquake Research in China

基　　金：国家重点研发计划(2021YFC3000701);国家自然科学基金(41704056)共同资助。

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70km^(2);Ⅷ度及以上区域面积约734km^(2),涉及7个乡。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 70 km~2,and the total area of Ⅷ degree and above is about 734 km~2,which is from 7 towns involved.

关 键 词：马尔康地震 地震速报 震源机制 地震烈度 破裂过程 

分 类 号：P315[天文地球—地震学]