1986年11月15日05时19分在台湾省花莲海外(24.1°N,121.7°E)发生了M_s7.6级地震及其随后的一系列震群。这次地震是1972年以来发生于台湾地震带内的最强的地震。这次地震,福州及沿海地区强烈有感,局部地区造成了少量的灾害。这次地震前后,在闽赣地下水位观测井网(以下简称闽赣井网)观测到了一系列水位异常动态。 At 05:19 on November 15, 1986, an M_s7.6 earthquake and its subsequent series of earthquakes occurred at Hualien, Taiwan Province (24.1 ° N, 121.7 ° E). This earthquake was the strongest earthquake that occurred in Taiwan’s seismic zone since 1972. The earthquake, Fuzhou and the coastal areas strongly felt that some areas caused a small amount of disasters. Before and after the earthquake, a series of anomalous water level dynamics were observed in the Fujian-Jiangxi groundwater observation well pattern (hereinafter referred to as the “Gan-Gan pattern”).