青海、新疆两省(区)地震波波形特征及其在速报定位中的应用
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摘要
通过对2000~2004年云南区域数字地震台网所记录的青海、新疆两省(区)23个MS≥5.0地震的数字波形记录进行分析,发现记录图上有较明显的Lg波,利用这一波形特点,使用双震相定位方法对上述23个地震进行重新定位,所得结果比仅使用P波到时的单震相定位精度要高,且所定参数与中国地震局国家台网中心及美国USGS给出的定位结果非常接近。
Through analyzing the waveform recordings of the 23 earthquakes with M_S≥5.0 occurred in Qinghai and Xinjiang recorded by the Yunnan regional digital seismic telemetric network in 2000-2004,we find there are obvious Lg waves on the recording maps.Taking advantage of this waveform characteristics,we take double-phase location produce to relocate above 23 earthquakes,and obtain more precise location results than just using single phase;furthermore,the determined parameters are very close to the results from the National Network Center of CEA and USGS of America.
Through analyzing the waveform recordings of the 23 earthquakes with M_S≥5.0 occurred in Qinghai and Xinjiang recorded by the Yunnan regional digital seismic telemetric network in 2000-2004,we find there are obvious Lg waves on the recording maps.Taking advantage of this waveform characteristics,we take double-phase location produce to relocate above 23 earthquakes,and obtain more precise location results than just using single phase;furthermore,the determined parameters are very close to the results from the National Network Center of CEA and USGS of America.
引文
[1]卫爱民,何家斌,颜其中.云南省区域数字地震遥测台网远震参数测定[J].地震研究,2005,28(2):144-149.
[2]北京大学地球物理系.地震学教程[M].北京:地震出版社,1980.
[3]国家地震局地球物理研究所.JB远震走时表[M].北京:地震出版社,1979.
[2]北京大学地球物理系.地震学教程[M].北京:地震出版社,1980.
[3]国家地震局地球物理研究所.JB远震走时表[M].北京:地震出版社,1979.
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