【摘要】 针对单台数字波形记录,利用Matlab语言编写了计算程序,以人机交互方式计算S波振幅衰减系数K值。分析S波振幅衰减系数K值与震中距的关系,发现新疆柯坪块体西侧地区,震中距在51～230 km时,K值与震中距相关性较小,表明震中距在此范围地震的K值可以作为地震预测预报的参数之一。以2009年4月22日阿图什5.0级地震为例,计算了柯坪块体以西地区地震的S波振幅衰减系数K值,发现震前出现2个月的低值过程,地震发生后恢复正常。更多还原

【Abstract】 Directing at digital waveform recorded by single station,the authors calculated amplitude attenuation coefficient(K value) of S wave using MATLAB program.Through analyzing relationship between amplitude attenuation coefficient of S wave and epicentral distance,they found when epicentral distance is about 51~230 km,correlation coefficient is less than ever which indicated earthquake within such epicentral distance can use this coefficient as a forecasting parameter.Taking Atushi earthquake with MS5.0 as an example,amplitude attenuation coefficient of S wave in western Keping appeared low value about two months before the earthquake,but returned to normal after it.更多还原