2001年3月7日四川布拖4.6级地震分析
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摘要
20 0 1年 3月 7日在四川省凉山州布拖县境内发生Ms4 6级强有感地震 ,震中位于北北西走向的凉山断裂南段 ,邻近则木河断裂。分析认为 ,这是一次主震—余震型地震序列 ;进一步用西昌遥测地震台网各子台的P波初动求得主震和最大余震的震源机制解 ,认为它们可能是北北西走向的凉山断裂活动的结果。
An Ms4 6 Earthquake On 7 March 2001,which was intensively sensed by the local people,occurred in region of Butuo County,Sichuan province.The epicenter of this earthquake is located in the southern part of Liangshan faults with NNW trending and it is near to the faults of Zemuhe.We studied the seismic sequence data and find that the type of this earthquake is the main shock-after shock type.We use the first movement data of P wave recording from the seismic monitoring network of Xichuan to analyze the focal mechanism solution and consider that the earthquake may result from the activity of the faults of Liangshan.
An Ms4 6 Earthquake On 7 March 2001,which was intensively sensed by the local people,occurred in region of Butuo County,Sichuan province.The epicenter of this earthquake is located in the southern part of Liangshan faults with NNW trending and it is near to the faults of Zemuhe.We studied the seismic sequence data and find that the type of this earthquake is the main shock-after shock type.We use the first movement data of P wave recording from the seismic monitoring network of Xichuan to analyze the focal mechanism solution and consider that the earthquake may result from the activity of the faults of Liangshan.
引文
凉山州政府2001年3月8日“关于我州布拖、普格、昭觉三县交界46级地震受灾损失情况的紧急报告”
国家地震局预测预防司预报处,“八五”地震短临预报成果推广培训教材(P30),1997年8月编写。]
[1]周存忠,程式等编著地震词典[M]上海:上海辞书出版社,1991,597
[2]杜平山则木河断裂带的演化历史及变形机制[J]四川地震,2000(1-2):65-76
[3]杜平山,冯元保川滇块体东缘地壳动力学问题的讨论[J]四川地震,2000(1-2):119-125
国家地震局预测预防司预报处,“八五”地震短临预报成果推广培训教材(P30),1997年8月编写。]
[1]周存忠,程式等编著地震词典[M]上海:上海辞书出版社,1991,597
[2]杜平山则木河断裂带的演化历史及变形机制[J]四川地震,2000(1-2):65-76
[3]杜平山,冯元保川滇块体东缘地壳动力学问题的讨论[J]四川地震,2000(1-2):119-125
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