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1981年8月13日内蒙丰镇发生5.8级地震,这是三年来北京及其邻区三百公里范围内较大的一次地震。地震后,我们分析了京、津地区各形变台的资料,认为香山台的连通管和伸缩仪记录资料在震前出现的异常有可能是这次地震的前兆信息。
An earthquake measuring 5.8 on the Richter scale in Inner Mongolia on August 13, 1981 caused a major earthquake of 300 kilometers in Beijing and its neighbors over the past three years. After the earthquake, we analyzed the data of deformable stations in the Beijing-Tianjin area and concluded that the anomaly occurred before the earthquake in the communication pipes and extensometer records of Xiangshan Station may be a precursor to this earthquake.