A minor 4.0 quake hit the Bay Area at 5:33 Monday morning, rattling parts of San Francisco and the East Bay. Did you feel it? According to USGS, it was centered in El Cerrito on the Hayward fault. Folks on Twitter described the quake as a "jolt or rumble," "strong," "could've have been just a 4.0," and "I am never ever sleeping naked again!"

We'll update throughout the morning with any reports of damage or injuries. Please expect a 10-20 minute delay with BART.

Feel free to share with us where you were when it happened.

Also, today's earthquake is a good reminder you should get prepared. 72Hours.org has all the info you need (e.g., first aid kit, your go bag, home safety, children) for earthquake preparation.