摘要
2023年2月6日,土耳其先后发生了M_(S)7.8、M_(S)6.7和M_(S)7.8强震,通过对江苏溧阳陆态网络连续重力观测仪记录的地震波进行分析,获得几点认识:(1)在溧阳台连续重力观测数据曲线上能记录到3次强震的地震波,记录到的2次M_(S)7.8重力地震波到时分别延迟10.72 min和10.63 min;(2)溧阳台连续重力观测同震响应对重力观测的潮汐和非潮汐参数均有影响,但未改变溧阳台连续重力观测正常的变化趋势;(3)同一地区相同震级的不同远震,重力响应的最大振荡幅度不完全一致,地震波持续时间也不完全相同,这与连续重力仪的采样率高低有关;(4)在时频图上表现为地震波能量信号比较突出,地震震级越大,0.1 Hz以下的高能量信号越强。
On February 6,2023,the three strong earthquakes with magnitudes at M_(S)7.8,M_(S)6.7 and M_(S)7.8 occurred successively in Türkiye.Through the analysis of seismic wave recorded by the continuous gravity observatory of the land state network at the Liyang Station in Jiangsu Province,we concluded as follows:(1)seismic waves were recorded on the continuous gravity observation data curve at the Liyang Station.The recorded gravity seismic waves were delayed by 10.72 min and 10.63 min,respectively.(2)The coseismic effect of continuous gravity observation at the Liyang Observatory has an impact on both tidal and non-tidal parameters of gravity observation.However,the normal trend of continuous gravity observation at the Liyang station has not been changed.(3)For different teleearthquakes with the same magnitude in the same region,the maximum oscillation amplitude of gravity response is not completely identical.The duration of seismic wave is not completely similar,which is related to the sampling rate of the continuous gravimeter.(4)we suggest that the energy signal of seismic wave is relatively prominent on the time-frequency diagram.The larger the earthquake magnitude,the stronger the high-energy signal below 0.1 Hz is.
作者
陈启林
张杰
狄樑
CHEN Qilin;ZHANG Jie;DI Liang(Earthquake Monitoring Center Station in Wuxi,Jiangsu Wuxi 214000)
出处
《四川地震》
2023年第3期18-21,共4页
Earthquake Research in Sichuan
