关键词: 历史记载, 地震事件, 震中, 震级, 发震断裂

Abstract: The parameters given by the available earthquake catalogs for the 1067 AD Chaoshan,Guandong,earthquake can't be used to explain reasonably the geographical distribution of the earthquake damages recorded in the historical documents. Comparing the recorded damages caused by this event with those caused by the 1918 AD Nan-ao large earthquake at the same places,we find that they are almost the same,and prove that these two earthquakes should be the characteristic earthquakes occurred on the same source. These imply that the 1067 earthquake should be located at just west of the Nanpeng Islands,and its magnitude should be up to 71/4. In view of that there have been diverse recognitions of the 1574 AD earthquake occurred in the coastal region of northeastern Fujian,we have reanalyzed the distributions of the damaged and felt areas of this event,and made a comparison with that of the 1906 AD earthquake off-shore of Xiamen. As a result,it is confirmed that the epicenter of the 1574 AD earthquake should be located at the sea area east of the shore between Fuzhou and Putian,but its magnitude is possibly up to 61/4. Moreover,it is believed that the 1574 Qingyuan,Zhejiang,earthquake recorded in relevant historical document is unlikely a destructive earthquake that occurred at Qingyuan,but more probably is just the one occurred at the sea area east of the shore between Fuzhou and Putian in the same year. Both the 1067 and the 1574 earthquakes were produced possibly along the NE-trending Off-shore Fault zone.

Key words: historical records, earthquake event, epicenter location, magnitude, seismogenic fault