选取昆明基准地震台观测山洞内放置的宽频带地震计BBVS-60及井下放置的GL-S60B深井宽频带地震计记录资料,采用新的震级国家标准(GB17740-2017),对地面及井下地震记录计算ML、mb、mB(BB)、MS、MS(BB)等5种震级,得到2种地震计的震级偏差。结果显示,ML平均偏差0.18,mb、mB(BB)平均偏差0,MS平均偏差-0.02,MS(BB)平均偏差-0.01。
Selecting the observation data recorded by the broadband seismograph BBVS-60 inside the cave and the underground deep well broadband seismograph GL-S60B at Kunming Seismic Station, and adopting the magnitude of the new national standard (GB17740-2017), five magnitudes of ML, mb, mB(BB), MS and MS(BB) were calculated for the ground and borehole records. The magnitude deviation of the two kinds of seismometers is calculated. The results showed that the average deviation of ML was 0.18, the average deviation of mb and mB(BB) was 0, MS average deviation was -0.02, and MS(BB) average deviation was -0.01.
2018,39(4): 96-108 收稿日期:2018-01-25
DOI:10.3969/j.issn.1003-3246.2018.04.012
基金项目:中国地震局监测、预测、科研三结合课题(项目编号:172507)
作者简介:李雷(1969-),女,云南普洱人,工程师,主要从事地震监测工作
参考文献:
李雷,钱文品,邓存华,等.昆明地震台地面与井下地震观测背景噪声对比分析[J].地震地磁观测与研究,2017,38(5):86-95.
刘瑞丰,王丽艳,袁乃荣,等. GB17740-2017 《地震震级的规定》宣贯教材[J]. 北京:地震出版社,2017.
田文德,胡俊明,等.成都台数字地震仪测定震级偏差分析与校正[J].四川地震,2012,(3):20-23.
杨晶琼,王兰兰,陈慧.云南地震台网同一台址数字与模拟观测震级对比研究[J].地震研究,2004,27(Z1):38-42.
彼得·鲍曼.中国地震局监测预报司译.新地震观测实践手册[M].北京:地震出版社,2006.