California earthquakes

M3.4 earthquake 9km WNW of Garnet, CA

A magnitude 3.4 earthquake struck 9km WNW of Garnet, CA on Thu, Sep 28, 1939, 10:41 AM GMT-8 (18:41 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.5 2km SE of Loma Linda, 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
3.4 (ml), minor
Local time
UTC
1939-09-28 18:41:56 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
33.929° N, 116.642° 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 2.3 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.16
Depth from
Operator assigned
Station coverage gap
281°, 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: 16 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.611km ESE of Moreno Valley, CA · 31771 days ago · 11 km deep · 44 km away
  2. 2.85km WSW of Yucaipa, CA · 31771 days ago · 2 km deep · 43 km away
  3. 2.623km ESE of Anza, CA · 31766 days ago · 6 km deep · 54 km away
  4. 2.610km WNW of Morongo Valley, CA · 31766 days ago · 6 km deep · 18 km away
  5. 3.127km NNW of Yucca Valley, CA · 31757 days ago · 6 km deep · 47 km away
  6. 2.710km WSW of Twentynine Palms, CA · 31750 days ago · 6 km deep · 48 km away
  7. 2.414km WNW of Morongo Valley, CA · 31748 days ago · 6 km deep · 18 km away
  8. 2.39km E of Big Bear City, CA · 31745 days ago · 6 km deep · 38 km away
  9. 2.922km NNW of Yucca Valley, CA · 31745 days ago · 6 km deep · 42 km away
  10. 3.06km NE of Big Bear City, CA · 31734 days ago · 6 km deep · 43 km away
  11. 2.44km E of Big Bear City, CA · 31734 days ago · 6 km deep · 39 km away
  12. 4.52km SE of Loma Linda, CA · 31731 days ago · 17 km deep · 57 km away
  13. 2.94km SE of Grand Terrace, CA · 31727 days ago · 19 km deep · 60 km away
  14. 3.010km NNE of Borrego Springs, CA · 31724 days ago · 6 km deep · 71 km away
  15. 3.07km E of Yucaipa, CA · 31717 days ago · 6 km deep · 32 km away
  16. 3.011km SSW of Borrego Springs, CA · 31711 days ago · 6 km deep · 86 km away

Before

  1. 2.37km SW of Lytle Creek, CA · 31781 days ago · 6 km deep · 90 km away
  2. 2.44km W of Mead Valley, CA · 31782 days ago · 6 km deep · 66 km away
  3. 3.310km S of Joshua Tree, CA · 31789 days ago · 6 km deep · 35 km away
  4. 3.030km NNW of Yucca Valley, CA · 31797 days ago · 6 km deep · 51 km away
  5. 2.725km N of Yucca Valley, CA · 31797 days ago · 6 km deep · 48 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3365108. Read Tue, Sep 22, 2026, 8:55 AM UTC.