1969 Bohai earthquake

1969 Bohai earthquake
Date July 18, 1969 (1969-07-18)
Magnitude MS 7.4
Depth 35 km
Epicenter 38°12′N 119°24′E / 38.2°N 119.4°E / 38.2; 119.4
Casualties 10

The 1969 Bohai earthquake occurred on July 18, 1969 at 13:24 local time. The epicenter was located in the Bohai Sea, off the coast of Shandong Province, China. The magnitude of this earthquake is MS 7.4. Areas of maximal intensity were mainly distributed around the estuary of the Yellow River. Ground cracks and sand boils were reported. The earthquake could be felt in Liaoning, Hebei, Beijing, Tianjin, Shanxi, Shandong, and Jiangsu. 10 people were reported dead.[1] This earthquake caused ground surface subsidences of about 15.1 cm ~ 15.8 cm in the Yellow River Delta region.[2] The mechanism of this earthquake was of dextral strike-slip faulting.[3][4] Although it was located near the Tancheng-Lujiang fault zone (郯庐断裂带), some researchers think that this earthquake was dominated by the seaward extending part of the Huanghekou-Liaocheng seismotectonic zone (黄河口-聊城地震构造带).[5]

References

  1. ↑ http://www.csi.ac.cn/manage/html/4028861611c5c2ba0111c5c558b00001/zhenli/liuying/zhenli/html/zhenli002.htm
  2. ↑ "黄河三角洲地区地面沉降驱动因素研究" by 刘桂卫, 黄海军, 杜廷芹, 别君, and 陈纪涛
  3. ↑ http://www.agu.org/journals/ABS/1988/TC007i005p00975.shtml
  4. ↑ "苏鲁—大别造山带及其周围现代地壳应力场与构造运动区域特征" by 徐纪人 and 赵志新
  5. ↑ "营口-潍坊断裂带新生代活动的特征" by 徐杰, 宋长青, and 高战武


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