From the view of external modulation by using the method of ratio of small earthquakes modulated by solid tide, we quantitatively analysed the small earthquake activities in Urumqi and Alma Ata.

• 利用固体潮小震调制比方法,从外因调制的角度出发,定量研究新疆乌鲁木齐和苏联阿拉木图地区小震活动。