A magnitude 4.3 earthquake struck near Berkeley early Monday at about 2:56am, shaking homes across the San Francisco Bay Area. The U.S. Geological Survey said the quake’s epicenter was just southeast of Berkeley at a shallow depth, making the jolt feel sharp and sudden.

Residents from Oakland to San Francisco reported rattling windows and swinging furniture, though no major damage or injuries were confirmed. Emergency officials noted only minor calls for assistance.

The region’s quake alert system was activated, but some people said warnings arrived late. Seismologists cautioned there could be small aftershocks, while stressing that a stronger quake is unlikely.

The tremor has once again highlighted earthquake preparedness in the Bay Area, especially along the Hayward Fault, considered one of California’s most dangerous.