1On the evening of July 25th, 668 (June 17th, 7th year of Emperor Kangxi of Qing Dynasty), a major earthquake occurred in Tancheng, Shandong Province. More than 500 kinds of county records, local chronicles, inscriptions and poems in East China, North China and even the Korean Peninsula 10 provinces and counties have affected the earthquake. ?
The worst-hit area of this earthquake is the junction of Tancheng, Linyi and Linshu. According to the Records of Tancheng County, Kangxi, "There was an earthquake on June 17th, the seventh year of Kangxi, and the sound came from the northwest. At that time, all the buildings and trees tilted forward and backward, and people who reached the top of the ground even dumped them two or three times one after another. The battlements, official residences, houses, villages and temples of the tower collapsed on the ground at that time ... At that time, the ground cracked, the spring water gushed out and the temple was sprayed. When I moved, I decided that there were hundreds of thousands of houses collapsed in Geyi, and the ground fissure was too wide or too deep to look at. Their depressions are all like classes and layers, and there are silt and fine sand on both sides of the cracks. The depth, width and narrow shape of the depression are difficult to describe. This is really a strange disaster. " In addition, most of Shandong, Jiangsu, northern Anhui and so on. Have been hurt to varying degrees. ?
This earthquake is the only earthquake with M = 8.5 in eastern China, and it is also one of the three earthquakes with M = 8.5 in China (the other two earthquakes were Haiyuan M = 8.5 earthquake in Ningxia on June 6, and Chayu 1950 in Tibet,1KLOC-0/8). ?
Shandong is located in the earthquake-prone area, with the Tanlu fault zone in the middle, Liaokao fault zone in the west, Bohai-Weihai fault zone in the north and South Yellow Sea seismic zone in the east, which has the geological structure background of moderate and strong earthquakes. During the last century 100, destructive earthquakes of magnitude 5 or above occurred in Shandong * *, once every 10 years on average. From 2006 to 2020, there are three national key earthquake monitoring and defense areas involving our province.