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采用地上,地下多频段对比接收的“DZ-1型地震电磁信息接收机”使用一年多来,经受住了严峻的考验,取得了理想的观测效果。 昆明测点是1987年7月投入正常观测的,从7月至11月一直没有记录到较明显的异常信号,同期省内无5级以上地震发生。从1987年12月至1988年11月初,该测点共记录到5组异常信号群,对应了400公里内5级以上地震4次,它们分别是1月10日宁蒗M 5.5,
The use of “DZ-1 Seismic Electromagnetic Information Receiver”, which was received by multi-band above and below ground, has withstood the severe test over the past year and achieved the ideal observation results. Kunming measuring point was put into normal observation in July 1987, and no obvious abnormal signal was recorded from July to November. In the same period, no earthquakes of magnitude 5 or above occurred in the province. From December 1987 to early November 1988, a total of five anomalous signal clusters were recorded at this measuring point, which corresponded to 4 earthquakes of magnitude 5 or above within 400 km. They were respectively Ninglang M 5.5 on January 10,