台湾海峡7.3级地震水震波特征研究

RESEARCH OF WATER LEVEL EARTHQUAKE WAVE CHARACTERISTICS IN TAIWAN STRAIT EARTHQUAKE WITH M S 7.3

台湾海峡７．３级地震是９０年代地震活跃期在我国的一个标志地震。根据全国８１口水位观测井水震波资料，对其水位振荡、水位阶变、记震距离等方面作了分析。研究结果表明，本次地震显示水位振荡快衰减也快以及水位阶变多、幅度大和不存在最佳记震距离等主要特征。水震波蕴存着丰富的地球物理信息内涵，这对地震孕育、发生信息的提取有其意义。

The Taiwan Strait earthquake with M S 7.3 was a marker one in our country for 1990s′ seismically active period. According to the data of water level earthquake wave obtained from 81 wells in our country, we analysed earthquake water level vibration, water level step change and the observation distance and so on. The results indicate that the main characteristics of this earthquake were expressed as high frequency and fast attenuation of water level vibration, great range of water level step change and without best observation distance and others. The water level earthquake wave is rich in geophysical information and has practical significance for extraction of information regarding earthquake preparation and occurrence.