M2.8 earthquake 31km WNW of Avalon, CA
A magnitude 2.8 earthquake struck 31km WNW of Avalon, CA on Wed, Oct 25, 1939, 3:15 AM GMT-8 (11:15 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M3.9 7km SSW of Seal Beach, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.8 (ml), micro
- Local time
- UTC
- 1939-10-25 11:15:41 UTC
- Depth
- 6.0 km (3.7 mi), shallow
- Epicenter
- 33.403° N, 118.650° 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 4.0 km horizontally, 31.6 km in depth
- Magnitude uncertainty
- ±0.32
- Depth from
- Operator assigned
- Station coverage gap
- 297°, poorly surrounded by stations
- Stations used
- 4
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 4 in the 30 days before it.
After
- 3.97km SSW of Seal Beach, CA · 31733 days ago · 6 km deep · 57 km away
- 1.92km WNW of Hawthorne, CA · 31729 days ago · 6 km deep · 63 km away
- 2.46km NNW of Santa Monica, CA · 31725 days ago · 3 km deep · 76 km away
- 2.42km NNE of Anaheim, CA · 31720 days ago · 6 km deep · 87 km away
- 1.92km SE of Huntington Beach, CA · 31718 days ago · 6 km deep · 69 km away
- 2.13km SSW of Palos Verdes Estates, CA · 31708 days ago · 6 km deep · 47 km away
- 2.22km NE of Universal City, CA · 31690 days ago · 14 km deep · 89 km away
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ci3365137. Read Tue, Sep 22, 2026, 8:26 AM UTC.