经过我们数年的观测,发现天文钟钟差在震中附近,震前数十天内,出现异常变化。不少的震例中,钟往往变慢,一般在异常变化恢复后(钟变快至原下降值附近或高于原下降值),会对应地震。方法和震例我们用求天文钟一定时间间隔的钟率,作曲线变化图。取二次对钟时间间隔为T小时,第一次对钟之钟差为△t_1,第二次为△t_2,钟率: After years of observations, we found that the difference in astronomical clock clock was near the epicenter, and within a few days before the earthquake, there was an abnormal change. In many earthquake cases, the clock tends to slow down. Generally, after the abnormal change resumes (the clock changes faster or lower than the original drop value), it will correspond to the earthquake. Methods and earthquake cases We use the astronomical clock at a certain time interval of the clock rate, curve changes. Take the secondary clock interval T hours, the first clock differential for the △ t_1, the second △ t_2, the clock rate: