山西数字测震台网“九五”“十五”两套系统定位参数对比分析
|
摘要
选取了2007年6月至2009年1月山西数字测震台网"九五"、"十五"两套系统记录到的496条可交地震和2002—2006年的部分ML3.0以上较大地震,对其进行了重定位。将两套系统的五大定位参数:发震时刻、震中经纬度、震级、震源深度进行了统计、对比。结果发现,发震时刻偏差小,基本满足速报与编目要求;震源深度基本在8～10km之间,不便用此做进一步的应用研究;震级上,同一事件"九五"、"十五"两套系统的平均震级整体差别不大,但与邻省定位结果相比,基本偏大0.2～0.4。
496 earthquakes which can be located and part of ML≥3 earthquakes in 2002-2006,simultaneously recorded by both systems of the 9th and10th five-year plans of Shanxi Digital Seismic Network,are relocated.Statistic and contrast of five location parameters of the two systems,including origin time,longitude and latitude of epicenter,magnitude and focal depth,are made.The results show that deviation of origin time is small,which are basically satisfy the demand of quick report and catalogue.Focal depths are usually in the range of 8～10 km,not suitable for further study.For magnitude,the whole difference of average magnitude of two systems for the same seismic event is small,but they are usually 0.2～0.4 larger than the results determined by systems of adjacent provinces.
496 earthquakes which can be located and part of ML≥3 earthquakes in 2002-2006,simultaneously recorded by both systems of the 9th and10th five-year plans of Shanxi Digital Seismic Network,are relocated.Statistic and contrast of five location parameters of the two systems,including origin time,longitude and latitude of epicenter,magnitude and focal depth,are made.The results show that deviation of origin time is small,which are basically satisfy the demand of quick report and catalogue.Focal depths are usually in the range of 8～10 km,not suitable for further study.For magnitude,the whole difference of average magnitude of two systems for the same seismic event is small,but they are usually 0.2～0.4 larger than the results determined by systems of adjacent provinces.
引文
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心