地震灾害为自然灾害之首。1986年,上海市科委、建委把上海抗震防灾工作,列为市“七五”重点科研项目。1977年,有关部门又对本市的地震烈度作了复核。一个城市的地震基本烈度是这个城市发展规划,土地利用和抗震设防的科学依据,有了这个依据就可以保证一个工程在它的有效寿命期限内免遭 Earthquake disasters are the first of natural disasters. In 1986, the Shanghai Science and Technology Commission and the Construction Commission listed Shanghai’s earthquake-resistant and disaster-prevention work as the city’s “Seventh Five-Year Plan” key scientific research projects. In 1977, relevant departments reviewed the intensity of the earthquake in the city. The basic earthquake intensity of a city is the scientific basis for this city’s development plan, land use and seismic fortification. With this basis, it can guarantee that a project will be protected from its useful life.