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郭增建先生 (195 7)称 15 5 6年 8 级大地震为关中大地震 ,并绘制了等震线图。 1983年版中国地震目录将其称为华县地震。之后 ,中国地震目录几经修改 ,但对震中位置都没再进行过进一步的研究和修订。 80年代以来 ,几位研究者从不同角度渐次提出这次地震的震中位置不在华县的新见解。本文同意这些见解 ,并通过分析大量史料和对发震构造的研究作进一步论证 ,提出对这次地震震中位置和发震构造的新认识。(1) 15 5 6年 8 级大地震的震中位置不在华县。极震区分布在蒲州 (今永济西黄河东岸 )、朝邑、潼关卫、华阴、华州、解州一带 ,故震中位置宜定在蒲州、潼关卫、华阴、朝邑之间 ,即北纬34°4 4′ ,东经 110°16′ ,震级仍沿用 1995年版中国地震目录修订的 8 级。由于蒲州最重 ,可称为15 5 6年蒲州 8 级大地震。(2 ) 15 5 6年 8 级大地震的发震构造不只是华山山前断裂 ,而是大致沿黄河分布的北北东向右旋走滑断裂带及其南北两端相反方向分布的渭河拉分盆地和运城、临猗一带张性地堑、地垒带 ,由它们共同组合而成的走滑型发震构造带 ,为该次大地震的发震构造。
Mr. Guo Zengjian (195 7) said the M8 8 magnitude earthquake in 1565 was the Guanzhong Earthquake, and an isokinetic map was drawn. The 1983 edition of the China Earthquake catalog calls it the Huaxian Earthquake. Since then, the Chinese earthquake catalog has been revised several times, but no further studies and amendments have been made on the location of the epicenter. Since the 1980s, several researchers gradually proposed from different angles that the epicenter of this earthquake is not located in Huaxian’s new opinion. This paper agrees with these opinions and provides further proofs of the epicenter location and seismogenic structures by analyzing a large amount of historical data and further studying the seismogenic structures. (1) The epicenter of the 8th magnitude earthquake in 1565 was not located in Hua County. The extreme earthquakes are located in the states of Puzhou (now the east bank of Yongji Yellow River), the town of Tongyi Wei, Huayin, Huazhou and Xiezhou. The location of the epicenter should be in Puzhou, Tongguan Wei, Huayin, Between 34 ° 44 ’north latitude and 110 ° 16’ east longitude, the magnitude still follows the Grade 8 revised by the 1995 edition of the China Earthquake Catalog. Due to the heaviest state of the city, it can be described as the 156 magnitude earthquake in Puzhou in 1556. (2) The seismogenic structure of Ms8 earthquake of magnitude 15-56 is not only the Huashan piedmont fault, but the north-northeast dextral strike-slip fault along the Yellow River and the Weihe River with opposite directions at both ends The sub-basin and Yuncheng, Linyi area of Zhangjiakou, basement zone, by their common combination of the strike-slip seismogenic structure belt, the earthquake for the earthquake seismogenic structure.