1985年4月18日禄劝6.3级地震,可以说是地壳内、外有关因素的又一次共同作用的结果。 首先,云南每年的地震强度,除与前几年省内地震能量的释放水平(地内条件)有关外,亦受当年太阳活动(外空环境)明显制约,结果使云南地震强弱的起伏具有准11年的韵律,各期同位相年的地震强度往往趋近一个“均值”。如1930、1941、1952、 The April 18, 1985 Luquan earthquake of magnitude 6.3 can be said to be the result of another joint action of relevant factors inside and outside the crust. First of all, the annual earthquake intensity in Yunnan is significantly restricted by the solar activity (outer space environment) in that year, except for the release of seismic energy in previous years (the conditions in the ground) in Yunnan Province. As a result, the fluctuation of Yunnan’s earthquake intensity is accurate The rhythm of 11 years, the seismic intensity of all phases of isotopic years tend to approach an “average”. Such as 1930, 1941, 1952,