| Detectability and reliability analysis of the local seismic network in Pakistan |
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| 作者姓名： | M.Qaisar T.Mahmood S.A.Khan |
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| 作者单位： | MicroSeismicStudiesProgram,PakistanAtomicEnergyCommission,Islamabad45650,Pakistan |
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| 摘 要： | 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 de-tectability levels are estimated from the twenty-five years of recorded data in terms of 50%,90%and 100% cumu-lative detectability threshokls,which were derived from frequency-magnitude distribution.From this analysis the 100%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 4km then the events occur within the network.Finally.the prob-lems faced during continuous operation of the local network,which effects its detectability,are discussed.
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| 关 键 词： | 巴基斯坦 地方地震台网 检测能力 可靠性分析 震源 震级 |
| 收稿时间： | 8 October 2001 |
| 修稿时间： | 12 July 2002 |
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(English Edition),2003,16(1):59-66. |
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| Authors: | MQaisar TMahmood SAKhan |
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| Institution: | Micro Seismic Studies Program, Pakistan Atomic Energy Commission, Islamabad 45650, Pakistan |
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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 de-tectability levels are estimated from the twenty-five years of recorded data in terms of 50%, 90% and 100% cumu-lative detectability thresholds, which were derived from frequency-magnitude distribution. From this analysis the 100% 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 prob-lems 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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