#18,465
While there aren't many details available yet, a 7.0 Magnitude, relatively shallow (8 miles), earthquake occurred off the Northern California coast late this morning local time. This was, fortunately, in a sparsely populated area of the state, but the potential for a small tsunami is a concern.
Aftershocks are likely, and there is always a slim possibility (usually about 5%) that this could be a foreshock, and a stronger temblor could occur in the next few days.
We discuss earthquake preparedness often in this blog, with the most recent example last September in:
#NatlPrep: 75% of Americans At Risk Of Experiencing A Damaging Earthquake