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。
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 epicen- tral distance is about 51 -230 km, correlation coefficient is less than ever which indicated earth-quake within such epicentral distance can use this coefficient as a forecasting parameter. Taking At-ushi 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.
出处
《内陆地震》
2012年第2期163-168,共6页
Inland Earthquake
基金
中国地震局星火计划(XH12055)
新疆地震科学基金课题(201106)联合资助
关键词
单台数字波形记录
K值
震中距
阿图什5.0级地震
Digital wave recorded by single station
K value
Epicentral distance
Earthquake in At-ushi with MsS. 0
