M2.9 earthquake 12km NNW of Grapevine, CA
A magnitude 2.9 earthquake struck 12km NNW of Grapevine, CA on Thu, Feb 23, 1939, 1:46 AM GMT-8 (09:46 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M3.8 10km NW of Frazier Park, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.9 (ml), micro
- Local time
- UTC
- 1939-02-23 09:46:00 UTC
- Depth
- 6.0 km (3.7 mi), shallow
- Epicenter
- 35.031° N, 118.997° 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 2.1 km horizontally, 31.6 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- Operator assigned
- Station coverage gap
- 261°, 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: 6 in the 60 days after this one and 4 in the 30 days before it.
After
- 3.24km W of Grapevine, CA · 31996 days ago · 6 km deep · 10 km away
- 3.810km NW of Frazier Park, CA · 31984 days ago · 6 km deep · 18 km away
- 2.67km W of Grapevine, CA · 31984 days ago · 6 km deep · 10 km away
- 2.715km WSW of Lake Hughes, CA · 31981 days ago · 6 km deep · 59 km away
- 2.311km WNW of Neenach, CA · 31954 days ago · 6 km deep · 35 km away
- 2.52km SSE of Grapevine, CA · 31946 days ago · 6 km deep · 14 km away
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ci3364905. Read Wed, Sep 30, 2026, 9:24 PM UTC.