California earthquake: Expect more powerful tremors, seismologists warn CALIFORNIANS should be bracing themselves for an even bigger earthquake in the coming days following the 6.4 magnitude tremor which rocked the state on July 4. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:US volcano warning: 18 pose ‘very high’ threat level in shock USGS reportHunters Moon 2018: Why is the moon so big this morning? Latest picturesBruno Latour, the Post-Truth Philosopher, Mounts a Defense of ScienceThree Campaign Ads That Are Putting Climate Change on the AgendaHunters Moon in pictures: Staggering FULL MOON lights up the night sky across the worldHunter's Moon 2018 live stream: Watch October Full moon again HERE - full timelapse video