Yep, that was an earthquake. If you live on the westside in LA, and you're burning the midnight oil, that jolt at 2:17AM was a 3.6 magnitude quake with an epicenter in the Santa Monica Bay. Check out the <a href="http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/ci14737572.html" target="_blank">earthquakes.usgs.gov</a> site for more info.