摘要
公元1038年,山西省定襄县、忻州市附近发生了一次7 1/4级大地震。通过大量的地质、地貌调查,确认系舟山断裂是这次地震的发震断裂,地震震中在水峪、鸦儿坑一带;地震在震中附近的基岩山地和黄土台地内造成了大面积的崩塌、滑坡,这些崩塌、滑坡阻塞河床,造成了一些堰塞湖。系舟山断裂在全新世有强烈的活动。距今6200年以来,断裂的垂直错动速率为2mm/年,断裂至少有2次地震活动。
A great earthquake (M=7(1/4)) occured near Dingxiang County and Xinzhou City, Shanxi Province, in 1038. Based on a large amount of field research in geeology and geomorphology, the Xizhoushan Fault is confirmed to be the anthquake fault of the disaster. The epicenter is near Shuiyu Village and Yaerkeng Village. Near the epicenter, the earthquake caused hundreds of fandslides in rock mountains and loess hills, which dammed river beds and formed a lot of harrier lakes. Xizhoushan Fault was very active in Holocene. During the last 6200 years, hte velocity of vertical displacement of the fault is 2 mm/year, and at least two earthquakes occurred on the fault.
出处
《华北地震科学》
北大核心
1989年第3期22-30,共9页
North China Earthquake Sciences
