Complex sentence: Furthermore, the ground must be saturated with water, which can be caused by snowmelt, rain, sleet or flooding and the site of a cryoseism generally has little or no snow cover to insulate the ground.
Split into simpler sentences: Furthermore, the ground must be saturated with water, which can be caused by snowmelt, rain, sleet or flooding. Usually, the site of a cryoseism has little or no snow cover to insulate the ground.