California earthquakes

M2.7 earthquake 48km WSW of Encinitas, CA

A magnitude 2.7 earthquake struck 48km WSW of Encinitas, CA on Sat, Apr 1, 1939, 7:24 PM GMT-8 (03:24 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.5 57 km WSW of La Jolla, California. 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
2.7 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1939-04-02 03:24:46 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
32.924° N, 117.793° 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 3.7 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.17
Depth from
Operator assigned
Station coverage gap
249°, 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: 10 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 2.912km NE of Trabuco Canyon, CA · 31954 days ago · 6 km deep · 95 km away
  2. 2.514km SW of Huntington Beach, CA · 31944 days ago · 6 km deep · 81 km away
  3. 4.557 km WSW of La Jolla, California · 31942 days ago · 16 km deep · 38 km away
  4. 4.056km SE of San Clemente Is. (SE tip), CA · 31942 days ago · 6 km deep · 44 km away
  5. 2.722km WSW of Dana Point, CA · 31942 days ago · 6 km deep · 51 km away
  6. 2.826km ESE of San Clemente Is. (SE tip), CA · 31937 days ago · 6 km deep · 37 km away
  7. 3.118km NNW of San Clemente Is. (SE tip), CA · 31920 days ago · 6 km deep · 57 km away
  8. 2.14km SE of Los Alamitos, CA · 31918 days ago · 6 km deep · 98 km away
  9. 2.511km ENE of Trabuco Canyon, CA · 31914 days ago · 6 km deep · 92 km away
  10. 2.115km SSW of Seal Beach, CA · 31903 days ago · 6 km deep · 84 km away

Before

  1. 2.82km SSE of Fountain Valley, CA · 31976 days ago · 6 km deep · 87 km away
  2. 2.12km SE of Huntington Beach, CA · 31981 days ago · 6 km deep · 86 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3364943. Read Thu, Oct 1, 2026, 4:39 AM UTC.