工业大城市的地震观测的有效方法之一是采用深井观测技术。美、苏、日等国早在五十年代已经使用,我国自七十年代起先后在京、津、沪地区实施深井观测技术。上海台网有深井9口,一般深度均在550米左右。从实际使用结果看,深井地震仪与同一地方地表地震仪OM B:30 One of the effective methods for seismic observation in industrial metropolises is the use of deep-well observation techniques. As early as the 1950s, the United States, the Soviet Union, Japan and other countries have already used it. Since the 1970s, China has implemented deep well observation techniques in Beijing, Tianjin and Shanghai. Shanghai Taiwan Network has 9 deep wells, the general depth of about 550 meters. From the actual use of the results, the deep seismograph and the same local surface seismograph OM B: 30