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under 4.0 = "was that an earthquake?"
over 4.0  = "that was definitely an earthquake."
over 5.0 = getting up off the couch in case it gets bigger
over 6.0 = getting into the door jamb out of bad 1980s instinct
but that's just me. can't fight that stupid 80s instinct to get in the fucking door jamb
Does California care about earthquakes below a 5.7?