I just felt an earthquake here in Sacramento. It felt like my chair rocked to the side and then back again. I can't find anything at usgs.gov yet, but it wasn't that large here. Just a little sway. With all the recent activity though it makes you wonder if "The Big One" is coming.

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Update (11:58AM PST)

Here's some info from the USGS. The quake was a 5.2 and located near Lake Tahoe.