M3.2 earthquake 9km SE of Biola, CA
A magnitude 3.2 earthquake struck 9km SE of Biola, CA on Sun, Aug 1, 1971, 1:36 AM PDT (08:36 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M3.6 8km SE of Biola, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.2 (ml), minor
- Local time
- UTC
- 1971-08-01 08:36:28 UTC
- Depth
- 6.0 km (3.7 mi), shallow
- Epicenter
- 36.742° N, 119.947° W
- Region
- California
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 2.7 km horizontally, 31.6 km in depth
- Magnitude uncertainty
- ±0.03
- Depth from
- Operator assigned
- Station coverage gap
- 281°, poorly surrounded by stations
- Stations used
- 5
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 4 in the 30 days before it.
After
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ci3322421. Read Thu, Sep 24, 2026, 3:00 PM UTC.