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甘肃省是我国地震活动频繁的少数几个省份之一。近三百多年来发生的7和8级大地震数仅次于新疆维吾尔自治区。其近邻宁夏回族自治区的海原在1920年还发生过震撼全球的8 1/2级大地震,因此一直是我国重点监测的危险地区。该省地震活动带主要有三条:一是西部的河西走廊地震带;二是东部的兰州一天水地震带;三是南部与四川相连通的武都—马边地震带。根据《中国地震目录》,这三条带上自17世纪初到现在共发生过4次7级、3次8级以上的大地震。但最近三十多年来,地震活动十分平静。1955年
Gansu Province is one of the few provinces where earthquakes are frequent in China. The magnitude of the 7th and 8th large earthquakes that occurred in nearly 300 years is second only to Xinjiang Uyghur Autonomous Region. Haiyuan, its immediate vicinity, Ningxia Hui Autonomous Region, also experienced a magnitude 8 1/2 earthquakes that shocked the world in 1920, and therefore it has always been a dangerous area that is under key monitoring in China. There are three major seismic activity belts in the province: one is the Hexi Corridor seismic belt in the west; the other is the Lanzhou-Tianshui seismic belt in the east; and the third is the Wudu-Mabian seismic belt that connects with the south in Sichuan. According to the “China Earthquake Catalog,” there were a total of four major earthquakes of magnitude 7 and 3 above magnitude 8 since the early 17th century on the three bands. However, the earthquake activity has been very calm for more than three decades. 1955