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近来,已开始积累关于地震前在周围地区地球内部温度上升的资料。在1970年普尔热瓦尔斯克地震前的两个半月内,“普尔热瓦尔斯克”钻井的水温和水位都有升高;在达吉斯坦地震(1970)前的两年中热流增加了两倍;1974—1976年间在费尔干纳发生几次破坏性地震之前的10—20天中,费尔干纳洼地的钻井和温泉的水温都曾变化了好几度。同时还发现在日本的有珠火山附近岩石温度出现变化之后便伴有地震发生。然而,所有上述测量工作都不是系统进行的。
Recently, information about the temperature rise inside the Earth in the surrounding area before the earthquake has started to accumulate. During the two and a half months prior to the Prachinwalsk earthquake in 1970, both the water temperature and the water level in the “Pulzerzevalk” well increased; the heat flow more than tripled in the two years prior to the Dagestan earthquake (1970) In the 10-20 days prior to the devastating earthquake in Fergana between 1974 and 1976, the temperatures in the wells and hot springs in the Fergana depression have changed by several degrees. At the same time, it was also found that there was an earthquake after the temperature of the rock near Mt. Zhudu in Japan changed. However, all of the above measurements are not performed systematically.