This discussion comes hours after a 4.4 magnitude earthquake was felt across the Bay Area.
RELATED: USGS reports 4.4 quake centered in Berkeley rattles several parts of Bay Area
"The last big earthquake on the Hayward fault happened about 150 years ago, in 1868. In fact, the 150th anniversary is coming up, we think that earthquake was a magnitude 6.8 or so," U.S. Geological Survey spokesperson Keith Knudsen said.
Did you feel it where you live? Let us know on our Facebook page here.
Click here for the latest coverage on earthquakes here in the Bay Area and around the world.
VIDEO: What to pack in your earthquake emergency kit