CNN CNN Newsroom March 30, 2014 18:22:00
Probably definitely would be days and probably stretch into weeks. but as time goes by, less and less aftershocks, fewer and fewer and they become smaller and smaller. basically they fade away. >> is there anything to attribute to this kind of activity, a shift in weather, climate, anything that provokes this? >> no. in the past looking at correlation moon induced tides, air mass as weather systems change, that sort of thing. there have been no correlations found with that. the only thing we know, this is a basic concept, the plate tectonic movement happens. we know california will be a seismi...
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