【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。更多还原

【Abstract】 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.更多还原