California earthquakes

M2.9 earthquake 3km N of Colton, CA

A magnitude 2.9 earthquake struck 3km N of Colton, CA on Wed, Aug 31, 1949, 2:58 AM GMT-8 (10:58 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M3.2 2km NW of Bell Gardens, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.9 (ml), micro
Local time
UTC
1949-08-31 10:58:41 UTC
Depth
14.8 km (9.2 mi), shallow
Epicenter
34.100° N, 117.317° W
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 0.5 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
135°
Stations used
7

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.66km N of Cabazon, CA · 28141 days ago · 6 km deep · 51 km away
  2. 3.22km NW of Bell Gardens, CA · 28127 days ago · 0 km deep · 79 km away
  3. 2.111km SSE of San Pedro, CA · 28124 days ago · 6 km deep · 99 km away
  4. 3.810km SSW of Morongo Valley, CA · 28123 days ago · 6 km deep · 66 km away
  5. 2.34km NE of San Bernardino, CA · 28117 days ago · 1 km deep · 8 km away
  6. 2.13km SW of San Bernardino, CA · 28115 days ago · 3 km deep · 1 km away
  7. 2.88km N of Cabazon, CA · 28112 days ago · 6 km deep · 52 km away
  8. 2.93km S of Desert Hot Springs, CA · 28105 days ago · 6 km deep · 78 km away
  9. 2.69km WSW of Anza, CA · 28104 days ago · 0 km deep · 82 km away
  10. 2.59km NE of Aguanga, CA · 28100 days ago · 6 km deep · 84 km away
  11. 3.46km NNW of Garnet, CA · 28099 days ago · 6 km deep · 70 km away
  12. 2.69km NNE of Aguanga, CA · 28097 days ago · 1 km deep · 78 km away
  13. 2.36km N of Altadena, CA · 28095 days ago · 5 km deep · 76 km away
  14. 2.810km NNE of Aguanga, CA · 28095 days ago · 0 km deep · 80 km away
  15. 3.011km ESE of Anza, CA · 28090 days ago · 5 km deep · 95 km away
  16. 2.65km W of Desert Hot Springs, CA · 28088 days ago · 6 km deep · 72 km away
  17. 2.19km ESE of Yorba Linda, CA · 28087 days ago · 6 km deep · 45 km away

Before

  1. 2.12km W of Inglewood, CA · 28150 days ago · 18 km deep · 98 km away
  2. 3.74km N of Banning, CA · 28158 days ago · 12 km deep · 44 km away
  3. 3.45km S of Redlands, CA · 28160 days ago · 15 km deep · 15 km away
  4. 2.45km SE of Banning, CA · 28171 days ago · 6 km deep · 49 km away
  5. 2.77km SSE of Yucca Valley, CA · 28172 days ago · 6 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3355671. Read Tue, Sep 22, 2026, 11:24 AM UTC.