California earthquakes

M2.5 earthquake 6km NNW of Castaic, CA

A magnitude 2.5 earthquake struck 6km NNW of Castaic, CA on Sat, Dec 3, 1949, 11:31 PM GMT-8 (07:31 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.9 2km SSE of Cudahy, CA. This one was a foreshock.

Castaic forecastMore in California

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
2.5 (ml), micro
Local time
UTC
1949-12-04 07:31:53 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
34.537° N, 118.649° 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 2.9 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.30
Depth from
Operator assigned
Station coverage gap
329°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 23 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 2.02km ENE of Lawndale, CA · 28058 days ago · 6 km deep · 77 km away
  2. 3.14km S of Santa Monica, CA · 28053 days ago · 0 km deep · 63 km away
  3. 3.04km W of Marina del Rey, CA · 28051 days ago · 6 km deep · 64 km away
  4. 2.54km W of Santa Monica, CA · 28050 days ago · 2 km deep · 59 km away
  5. 1.92km NW of Lawndale, CA · 28050 days ago · 0 km deep · 75 km away
  6. 2.83km ESE of Reseda, CA · 28043 days ago · 6 km deep · 41 km away
  7. 2.83km SE of Marina del Rey, CA · 28037 days ago · 0 km deep · 67 km away
  8. 1.81km SW of Westwood, CA · 28034 days ago · 6 km deep · 58 km away
  9. 1.81km SSW of Artesia, CA · 28033 days ago · 0 km deep · 92 km away
  10. 2.12km N of Pomona, CA · 28028 days ago · 0 km deep · 97 km away
  11. 2.711km N of Ojai, CA · 28027 days ago · 6 km deep · 54 km away
  12. 2.69km SSE of Carpinteria, CA · 28025 days ago · 6 km deep · 81 km away
  13. 2.618km W of Manhattan Beach, CA · 28022 days ago · 6 km deep · 76 km away
  14. 3.92km SSE of Cudahy, CA · 28021 days ago · 3 km deep · 79 km away
  15. 2.62km NE of Commerce, CA · 28020 days ago · 14 km deep · 74 km away
  16. 2.216km WSW of Manhattan Beach, CA · 28017 days ago · 6 km deep · 80 km away
  17. 3.018km SW of Malibu, CA · 28016 days ago · 6 km deep · 76 km away
  18. 3.510km W of Palos Verdes Estates, CA · 28013 days ago · 6 km deep · 83 km away
  19. 2.17km SSE of Rancho Palos Verdes, CA · 28009 days ago · 6 km deep · 98 km away
  20. 3.92km SSE of Fillmore, CA · 28008 days ago · 6 km deep · 30 km away
  21. 3.22km SE of Fillmore, CA · 28007 days ago · 6 km deep · 29 km away
  22. 2.49km NW of Fillmore, CA · 28005 days ago · 6 km deep · 33 km away
  23. 2.45km S of Rancho Palos Verdes, CA · 28003 days ago · 6 km deep · 97 km away

Before

  1. 2.14km SE of Topanga, CA · 28060 days ago · 6 km deep · 53 km away
  2. 1.58km NNE of Sunland, CA · 28061 days ago · 6 km deep · 42 km away
  3. 2.23km WNW of Manhattan Beach, CA · 28071 days ago · 6 km deep · 74 km away
  4. 1.710km NNE of Lake View Terrace, CA · 28072 days ago · 6 km deep · 37 km away
  5. 3.52km SSE of Cypress, CA · 28076 days ago · 6 km deep · 99 km away
  6. 2.33km NNE of Chatsworth, CA · 28077 days ago · 12 km deep · 29 km away
  7. 2.94km NE of Chatsworth, CA · 28083 days ago · 1 km deep · 29 km away
  8. 2.34km ENE of Los Angeles, CA · 28083 days ago · 7 km deep · 66 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3354813. Read Wed, Sep 30, 2026, 6:41 PM UTC.