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4.0 Earthquake Near Concord, California

Posted by timothy on from the live-from-the-scene dept.

craighansen writes: Just felt a small earthquake, which I confirmed at USGS was a magnitude 4.0 at 2015-05-03 22:13:19 UTC, followed by a magnitude 2.7 a minute later, both located near Concord, California.

1 of 128 comments (clear)

  1. Re:A story for those who by choprboy · · Score: 5, Informative

    A story for those who don't understand orders of magnitude?

    As a former Californian, the magnitude scale goes something like this:
    3.5 - Huh, what? When did that happen?
    4.0 - Ehh, something moved slightly...
    4.5 - Oh, I actually felt that one there.
    5.0 - Heh, that actually qualifies as an earthquake.
    5.5 - Oh boy, we are starting to shake pretty good. Stay away from the glass, this one might be a little rough.
    6.0 - Find a doorway quick and hang on! This one will be rough.
    6.5 - Oh crap, duck and cover! 20sec of destruction, 2 weeks of "The Big One is coming! Are you prepared? Will you die?!" news stories.
    7.0 - Oh $h17!!! This one is going to hurt.
    8.0 - Wait, what? You mean the Big One is real?

    Scale +/-0.5 depending on where you are located in California (i.e. Bay area vs. Inland empire). A 4.0 ranks as barely noticable ...