# A 3.4 quake wakes the East Bay

> A small overnight tremor near Brentwood rattled Contra Costa County and was felt for miles.
- Title: A 3.4 quake wakes the East Bay · California Post | Shortify
- Summary: A small overnight tremor near Brentwood rattled Contra Costa County and was felt for miles. A shallow 3.4 quake south of Brentwood woke parts of the East Bay…
- Keywords: earthquake, bay area, contra costa, usgs, california, news, entertainment, quake, wakes, East, Bay, California Post
- Source: California Post — https://nypost.com/2026/09/12/us-news/earthquake-hits-east-bay-area-in-contra-costa-county
- Published: 2026-09-12T17:19:32+00:00
- Read time: 1 min
- Topics: earthquake, bay area, contra costa, usgs, california, news, entertainment
## A jolt after midnight
An earthquake struck Contra Costa County in the early hours of Saturday morning, waking people across the East Bay.
## Magnitude 3.4
The US Geological Survey put the quake at 3.4, small enough to rattle windows and nerves rather than break anything.
## Five miles from Brentwood
The epicenter sat about 5.5 miles southwest of Brentwood, in the eastern stretch of the Bay Area.
## Eleven miles down
Seismographs recorded the tremor roughly 11 miles deep. Shallow quakes like this one carry their shaking further at the surface.
## Felt from Pleasanton to Pittsburg
Residents in towns well beyond the epicenter reported feeling it, according to KRON 4, spreading the shake across a wide slice of the East Bay.
## No injuries, no damage
Nothing broken and nobody hurt, by the early count. For most people the quake was a few seconds of confusion in the dark.
## Key takeaway

A shallow 3.4 quake south of Brentwood woke parts of the East Bay just after midnight, with no injuries or damage reported.