The size of the earthquake that recently rattled the San Francisco Bay Area on September 22, 2025, was estimated at magnitude 4.3, centered in Berkeley near the Hayward fault. It caused "light" shaking felt in surrounding areas but no immediate reports of damage.

For reference, other major earthquakes in 2025 included a very large magnitude 8.8 earthquake off the Kamchatka Peninsula in July, and a deadly 7.7 magnitude earthquake in Myanmar in March.

So, the most recent earthquake in the Bay Area was moderate in size, magnitude 4.3.