摘要
基于2019—2022年京津冀及周边地区37次M_(L)3.2~5.9地震的963个烈度计和410个强震仪台站数据,利用P_(d)方法建立垂直向波形在P波到时后2~7 s的P_(d)幅值与震级之间的36种估算模型,通过拟合关系标准差确定烈度计和强震仪的最佳滤波频段分别为1~3 Hz和0.5~3 Hz,同时建立二者在P波到时后3 s内的P_(d)方法震级估算模型。参数拟合结果表明,模型拟合斜率和相关系数较高,标准差较小,模型整体可靠度较高。反向验证和新数据验证结果显示,与台网编目震级相比,单台P_(d)方法震级偏差主要集中在±0.5范围内,说明本文建立的2种P_(d)方法震级估算模型具有可行性,可以较好地应用于京津冀地区。
Based on 963 records of intensity meters and 410 records of strong motion seismographs of 37 earthquakes of M_(L)3.2 to 5.9 in Beijing-Tianjin-Hebei and its surrounding areas from 2019 to 2022,we use the P_(d)method to establish 36 magnitude estimation models between P_(d)amplitude within 2 to 7 seconds after P-wave arrival time of vertical waveform and magnitude.By fitting the standard deviation,the optimal filtering frequency bands of intensity meters and strong motion seismographs are determined to be 1 to 3 Hz and 0.5 to 3 Hz respectively.Meanwhile,we establish the magnitude estimation model of intensity meters and strong motion seismographs within 3 seconds after P-wave arrival time using P_(d)method.The parameter fitting results show that fitting slope and correlation coefficient are high,the standard deviation is small,and the overall reliability is high.The results of reverse and new data verification indicate that the magnitude deviation of P_(d)method is mainly within±0.5,which shows that the two models established in this paper are reasonable and can be well applied in Beijing-Tianjin-Hebei region.
作者
王莉婵
毛国良
郭垚嘉
林庆西
WANG Lichan;MAO Guoliang;GUO Yaojia;LIN Qingxi(Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards,1540 West-Quanbei Street,Xingtai 054000,China;Hebei Earthquake Agency,262 Huaizhong Road,Shijiazhuang 050021,China;Guangdong Earthquake Agency,81 Mid-Xianlie Road,Guangzhou 510070,China)
出处
《大地测量与地球动力学》
北大核心
2025年第3期260-265,共6页
Journal of Geodesy and Geodynamics
基金
河北省地震科技星火计划(DZ202108100004)
中国地震局地震科技星火计划(XH23005A)。
关键词
京津冀地区
地震预警
P_(d)方法
震级估算模型
Beijing-Tianjin-Hebei region
earthquake early warning
P_(d)method
magnitude estimation model
