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地震重点监视防御区是指未来一定时间内,可能发生破坏性地震或可能受破坏性地震影响造成严重地震灾害损失,需要加强防震减灾工作的区域。自20世纪70印代初期开始,我国建立起年度全国地震会商会制度,对未来一年的地震趋势做出判断,并圈定若干个未来一年或稍长时间内的全国地震重点危险区。这些重点危险区作为进一步加强监视、开展震情工作的重点目标。多年实践表明,地震重点危险区大多集中在西部地区,而造成地震损失和潜在震害的却主要在大中城市集中、人口稠密的东部地区,
Earthquake focus surveillance and defense zone is the area that may require devastating earthquakes or may be damaged by the devastating earthquakes causing serious earthquake disasters within a certain period of time in the future and needs strengthening of earthquake prevention and disaster reduction. Since the early 1970s in the 20th century, China established the annual National Seismological Chamber of Commerce system to judge the earthquake tendency in the coming year and delineate several key earthquake-hazard areas in the coming year or a little longer. These key danger areas serve as the key targets for further strengthening the surveillance and carrying out the earthquake situation work. Years of practice show that most of the major earthquake risk areas are concentrated in the western region, while the earthquake damage and potential earthquake damage are mainly concentrated in large and medium-sized cities, densely populated eastern regions,