甘肃玉门5.9级地震前周至数字化综合观测井的异常特征
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摘要
2002年12月14日,甘肃玉门发生5.9级地震,震前,距离震中1000km的周至地震台地下水数字化综合观测井的地热、水位、流量三个测项都出现了明显的短临异常显示。本文介绍了震前周至井出现的短临异常变化。与该台历史手工观测结果对比,数字化观测更有利于捕捉短临前兆信息及其变化的完整过程。
Yumen M5.9 earthquake occurred in Dec.14, 2002. Before the event, the water temperature, water level and outflow of Zhouzhi well, which is 1000km away from the epicenter, all showed clear shortterm and imminent anomalies. The variation of these anomalies is introduced here. Compared with the historical analogue data of the station, the digital observation is more propitious to detecting shortterm and imminent precursors as well as its whole variation.
引文
[1] 万迪,汪成民,等.地下水动态异常与地震短临预报[M].地下水微动态短临异常基本特征.北京:地震出版社,1993,148 164.
    [2] 舒优良,张世民.周至井地下流体数字化观测技术改造及应用[J].华北地震科学,2002,20(2):42 49.

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