波形模板匹配定位方法在北京地区的应用

Application of Waveform Match and Location Method in Beijing

在地震学研究中,高效的微震检测方法是既重要又具有挑战性的问题。本文对波形模板匹配检测方法、匹配定位技术、波形自相关检测技术进行详细介绍和对比,对国内外应用实例进行总结,并展望微震检测方法应用前景和发展趋势。利用基于图形处理器加速的匹配定位技术和双差地震定位法,对北京地区19个台站记录的2015年连续地震资料进行分析。基于中国地震台网中心提供的地震目录,筛选出245个地震事件作为模板事件,检测得到1229个地震事件,约为地震台网原始地震目录数量的5倍。精定位结果可显示小震沿黄庄-高丽营断裂周边小断裂分布形态特征,本文微震检测和定位结果可为研究北京地区地震活动性与发震断层深部构造提供基础数据支撑。

In seismology research,efficient microseismic detection is an important and challenging problem.In this paper,we first introduce the following methods in detail:(1)matched filter method;(2)match and locate method;(3)waveform autocorrelation detection technology.We summarize the domestic and foreign studies,and compare the advantages and disadvantages of different methods.Then,the future development of their application of the microseismic detection method is prospected.Meanwhile,we apply Graphics Processing Unit-based match and locate(GPU_M&L)and double-difference location algorithm to analyze the continuous seismic data during 2015 recorded by 19 stations in the Beijing area.Two hundred and forty-five earthquakes listed on the standard catalog provided by the China Earthquake Network Center were selected as templates.About 1,229 events are identified,which is about 5 times of the network catalog.Our results reveal the geometrical structure of the small faults surrounding the Huangzhuang-Gaoliying fault,and provide important basic data support for studying the seismic activity and the deep structure of the seismogenic faults in the Beijing area.