江苏地区同频带井下地震计地震监测能力对比

为了解江苏地区测震台站宽频带井下地震计监测能力,选取10个代表性台站配备的EDAS-24GN数采+GL-S60B地震计系统记录进行对比分析。以震相记录幅值与背景噪声均方根比值为标准,根据近震震级公式,用量规函数反推单台控制距离,计算同频带井下地震计理论地震监测能力,采用相同标准,根据震相幅值记录,得到实际地震监测能力,并绘制震中分布图相互验证,分析各井下地震计地震监测能力差异。结果显示:①井下地震计安装方式。落底安装的地震计监测能力整体优于卡壁安装;②台基条件。与破碎非固态层相比,构造越完整,地震监测能力越高。

Comparative analysis of monitoring capability of underground seismometer in the same frequency band in Jiangsu

In order to understand monitoring capability of broadband underground seismometer widely used in Jangsu, 10 representative underground seismic stations have been selected (EDAS-24GN +GL-S60B). Based on the ratio of seismic phase amplitude to root mean square of background noise, according to the formula of near earthquake magnitude, single control distance has been deduced by gauge function, monitoring capability of underground seismometer in the same frequency band has been calculated. Under the same standard, actual monitoring capability can be obtained with actual recorded phase amplitude. Seismic distribution maps have been drawn separately to verify results mutually. Summarize and analyze the difference of monitoring ability of underground seismometers, internal connection between monitoring ability and platform condition and installation method has been analyzed.