| 利用深井观测速度型记录的最大振幅测定近震震级的一种方法 |
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| 引用本文： | 章纯,朱元清,李慧民.利用深井观测速度型记录的最大振幅测定近震震级的一种方法[J].地震地磁观测与研究,1992(6). |
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| 作者姓名： | 章纯 朱元清 李慧民 |
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| 作者单位： | 上海市地震局，上海市地震局，上海市地震局 |
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| 摘 要： | 根据上海台网观测记录到的上海及邻近地区1985年至1990年期间179次地震事件的资料,以虹桥台、南汇台的两口深井观测地震记录为例,探讨如何利用深井观测速度型记录的最大振幅来测定近震震级。对于400公里以内的地震,本文根据统计规律,提出:在已知系统速度灵敏度K,地震记录的最大振幅A和地震震中距Δ的前提下,速度型记录的近震震级可以表示为M_v=logA/K+blog(Δ)+c误差分析表明,M_v与M_L是比较接近的,结果是可用的。
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| 关 键 词： | 深井观测 速度型记录 震级 最大振幅 速度灵敏度 |
A METHOD TO DETERMINE THE LOCAL MAGNITUDE USING THE MAXIMUM AMPLITUDE OF BORE-HOLE VELOCITY RECORDS |
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| Zhang Chun,Zhu Yuanqing and Li Huimin Seismological Bureau of Shanghai Municipality,Shanghai ,China.A METHOD TO DETERMINE THE LOCAL MAGNITUDE USING THE MAXIMUM AMPLITUDE OF BORE-HOLE VELOCITY RECORDS[J].Seismological and Geomagnetic Observation and Research,1992(6). |
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| Authors: | Zhang Chun Zhu Yuanqing and Li Huimin Seismological Bureau of Shanghai Municipality Shanghai China |
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| Institution: | Zhang Chun,Zhu Yuanqing and Li Huimin Seismological Bureau of Shanghai Municipality,Shanghai 200062,China |
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| Abstract: | Based on the data of 179 earthquakes from 1985 to 1990 in Shanghai and its adjacent area,for the records of the two bore-hole seismometers of Hongqiao and Nanhui seismic stations,we have studied how to determine the local magnitude by using the maximum amplitude of bore-hole velocity records.For the earthqua- kes within 400 km,we obtain the formala for the local magnitude of veloaty records Mv=log(A/K)+b~*log(D)+C Where A is the maximum amplitade of velocity,record,K is the system ve- locity sensibility,D is the epicentral distance,b and c are two constants. The error anlysis rkorss that the value M_v is quite well close of M_L,so the formula is validity. |
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| Keywords: | Bove-hole observation Velocit yrecords magnitude Maxmum amplitude Velocity sensibility |
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