| 巴基斯坦地方地震台网的检测能力和可靠性分析 |
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| 引用本文： | M.Qaisar,T.Mahmood,S.A.Khan,许忠淮.巴基斯坦地方地震台网的检测能力和可靠性分析[J].地震学报,2003,25(1):55-61. |
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| 作者姓名： | M.Qaisar T.Mahmood S.A.Khan 许忠淮 |
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| 作者单位： | (巴基斯坦伊斯兰堡45650原子能委员会微震研究项目组) |
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| 摘 要： | 利用Bungum和Husebye的方法，分析了地方地震台网的检测能力和可靠性．用标准的计算机定位程序重新测定了地震位置．根据25年的地震记录，分别由震级-频度关系导出的50%、90%和100%的累积检测率估计了检测水平．对台网内地震，相应于100%检测率的震级下限为ＭＬ＝1.7．用台网内固定的实际震源，研究了台网对震源位置的测定精度．对网内地震，震中测定误差小于4 km．最后讨论了台网连续工作时可能会遇到的影响检测能力的一些问题．
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| 关 键 词： | 地方地震台网& & 检测能力& & 巴基斯坦 |
| 文章编号： | 0253-3782(2003)01-0055-07 |
| 修稿时间： | 2001年10月8日 |
DETECTABILITY AND RELIABILITY ANALYSIS OF THE LOCAL SEISMIC NETWORK IN PAKISTAN |
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| M.Qaisar,T.Mahmood,S.A.Khan.DETECTABILITY AND RELIABILITY ANALYSIS OF THE LOCAL SEISMIC NETWORK IN PAKISTAN[J].Acta Seismologica Sinica,2003,25(1):55-61. |
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| Authors: | MQaisar TMahmood SAKhan |
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| Abstract: | The detectability and reliability analysis for the local seismic network is performed employing by Bungum and Husebye technique. The events were relocated using standard computer codes for hypocentral locations. The detectability levels are estimated from the twenty-five years of recorded data in terms of 50,90 and 100 percent cumulative detectability thresholds, which were derived from frequency-magnitude distribution. From this analysis the 100 percent level of detectability of the network is ML=1.7 for events which occur within the network. The accuracy in hypocentral solutions of the network is investigated by considering the fixed real hypocenter within the network. The epicentral errors are found to be less than 4 km when the events occur within the network. Finally, the problems faced during continuous operation of the local network, which effects its detectability, are discussed. |
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| Keywords: | local seismic network detectability Pakistan |
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