摘要
利用乌什、阿合奇台数字形变观测资料,分析了近几次远场7级左右地震和近场5级地震前形变资料的变化情况。分析表明:震前2个台的数字形变资料有明显变化的大多是NS分向,部分地震前的中短期异常可以认定,远场强震和近场5级地震前7天左右,乌什水管仪NS向大多存在不同程度高频抖动和畸变的临震异常,与天气干扰导致的高频变化不同。同时,对2个台的数字与模拟倾斜资料进行了对比分析,并对几次中强地震前后形变资料变化所反映的地球物理现象进行了探讨。
This article analyzes anomalous change before several far-field strong earthquakes and near-field moderate earthquakes using digital crustal deformation observation data in Wushi and Aheqi seismic station. The analysis showed that： the N-S direction had significant changes before earthquake ; some medium-short term anomaly before earthquake can be affirmed ; differ from weath-er interference, some impending earthquake anomaly such as high-frequency vibration and distortion were recorded in N-S direction of water tube tilt meter in Wu Shi. By comparing with digital data with analog of tilt observation in these two seismic stations, they discussed geophysical phenomenas reflected by variation of deformation data before several moderate earthquakes.
出处
《内陆地震》
2012年第2期147-156,共10页
Inland Earthquake
关键词
乌什台
阿合奇台
数字形变
异常变化
对比分析
Wu Shi station
Aheqi Station
Digital deformation
Anomaly change
Comparative a-nalysis
