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1983年11月7日山东省菏泽县境内发生5.9级地震,震中区遭受Ⅶ度破坏。这是继1948年5月29日菏泽5 1/2级地震后,在1937年8月1日菏泽7级地震震中区内发生的又一次中强地震。这次地震前曾依据某些异常现象,从不同角度尝试做过中期地震趋势估计。由于它是重复性地震,且发生在华北地区强震活动相对平静期内,故深入探讨这次地震的震兆特征,对于中强地震预报是有意义的。
On November 7, 1983, a magnitude 5.9 earthquake occurred in Heze County, Shandong Province, and the epicenter suffered a Ⅶ degree of damage. This is yet another strong earthquake that occurred within the epicenter of the Heze M7 MS7 Earthquake on August 1, 1937, following the May 5 Heze 5 May 1 earthquake. According to some anomalies before the earthquake, we tried to estimate the medium-term earthquake tendency from different angles. Because it is a repetitive earthquake and occurs during relatively calm periods of strong earthquakes in North China, it is significant for the mid-strong earthquake prediction to probe deeply into the characteristics of the earthquakes in this earthquake.