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在太阳活动与地震相关性研究的基础上，指出了在周期性太阳活动的调控下，地震活动也显示出明显的周期性演化。地震除存在１１年周期外，还存在２２年周期，后者形成了本世纪以来地震的４个活跃期和４个平静期。云南在地震活跃期中，大震的时间间隔有愈来愈缩短的趋势，并按Ｔｘ＝ΔＴ１／２的规律演化。在一个活跃期中，最后一个大震的时间间隔比这个规律规定的时间间隔更短。如果某个大震的爆发时间与由这个规律预测的时间相差（一般是提前）５０％以上，就意味着本地震活跃期的大震从此结束。根据这个规律，对云南未来三年的大震趋势作了预测
Based on the correlation between solar activity and earthquake, it is pointed out that under the regulation of periodic solar activity, the seismic activity also shows obvious periodic evolution. In addition to the 11-year cycle, earthquakes still exist for 22 years and the latter form 4 active periods and 4 quiet periods of earthquakes since the present century. During the active phase of the earthquake in Yunnan, the intervals of major earthquakes tend to shorten more and more and follow the rule of Tx = ΔT1 / 2. During an active phase, the time interval of the last major earthquake is shorter than the regular time interval. If a major earthquake erupts more than 50% of the time predicted by this law (usually ahead of time), it means the earthquake that triggered this active earthquake has ended. According to this law, the trend of the great earthquake in Yunnan in the next three years is predicted