Pinole is about a 20-mile drive northeast from San Francisco. What to know about earthquakes Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says.

PINOLE, CA — A small earthquake rattled parts of the San Francisco Bay Area Sunday night. The quake with a preliminary magnitude of 3.4 was reported at 9:30 p.m. about 1.2 miles north-northwest of ...