California earthquakes

M2.4 earthquake 4km E of Morongo Valley, CA

A magnitude 2.4 earthquake struck 4km E of Morongo Valley, CA on Wed, Mar 29, 1939, 5:10 AM GMT-8 (13:10 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.3 17km SE of Anza, CA. This one was a foreshock.

Morongo Valley forecastMore in California

Map

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

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The earthquake

Magnitude
2.4 (Mh), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1939-03-29 13:10:07 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
34.048° N, 116.539° 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 8.1 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.23
Depth from
Operator assigned
Station coverage gap
347°, poorly surrounded by stations
Stations used
3

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.83km W of Morongo Valley, CA · 31964 days ago · 6 km deep · 7 km away
  2. 2.919km NNE of Indio, CA · 31961 days ago · 6 km deep · 41 km away
  3. 3.73km E of Running Springs, CA · 31960 days ago · 6 km deep · 53 km away
  4. 2.43km ESE of Running Springs, CA · 31957 days ago · 6 km deep · 52 km away
  5. 2.912km NE of Trabuco Canyon, CA · 31955 days ago · 6 km deep · 96 km away
  6. 2.74km WNW of Aguanga, CA · 31940 days ago · 6 km deep · 74 km away
  7. 2.44km S of Highland, CA · 31928 days ago · 6 km deep · 62 km away
  8. 4.317km SE of Anza, CA · 31920 days ago · 6 km deep · 65 km away
  9. 2.511km ENE of Trabuco Canyon, CA · 31916 days ago · 6 km deep · 94 km away
  10. 2.84km SSE of North Shore, CA · 31911 days ago · 6 km deep · 84 km away
  11. 3.58km SW of Big Bear Lake, CA · 31908 days ago · 8 km deep · 42 km away
  12. 2.86km NW of Norco, CA · 31905 days ago · 6 km deep · 98 km away

Before

  1. 2.71km SSE of Moreno Valley, CA · 31966 days ago · 14 km deep · 65 km away
  2. 2.822km ESE of Anza, CA · 31970 days ago · 6 km deep · 66 km away
  3. 2.715km WNW of Morongo Valley, CA · 31973 days ago · 6 km deep · 19 km away
  4. 2.718km NW of Yucca Valley, CA · 31973 days ago · 6 km deep · 21 km away
  5. 3.517km NW of Yucca Valley, CA · 31991 days ago · 6 km deep · 17 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3364939. Read Fri, Oct 2, 2026, 8:38 PM UTC.