California earthquakes

M2.4 earthquake 11km N of Foothill Ranch, CA

A magnitude 2.4 earthquake struck 11km N of Foothill Ranch, CA on Sat, Jan 21, 1950, 6:47 AM GMT-8 (14:47 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.3 0km SE of Vincent, CA. This one was a foreshock.

Foothill Ranch 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 (ml), micro
Local time
UTC
1950-01-21 14:47:56 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
33.783° N, 117.662° 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 1.5 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.21
Depth from
Operator assigned
Station coverage gap
189°, poorly surrounded by stations
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: 18 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 2.17km SSE of Rancho Palos Verdes, CA · 28008 days ago · 6 km deep · 66 km away
  2. 2.55km W of Mira Loma, CA · 28003 days ago · 1 km deep · 26 km away
  3. 2.45km S of Rancho Palos Verdes, CA · 28002 days ago · 6 km deep · 68 km away
  4. 1.64km NE of Baldwin Hills, CA · 27998 days ago · 19 km deep · 69 km away
  5. 2.713km NNE of Cabazon, CA · 27998 days ago · 8 km deep · 89 km away
  6. 2.79km NNW of Cabazon, CA · 27996 days ago · 6 km deep · 82 km away
  7. 2.12km N of Altadena, CA · 27996 days ago · 11 km deep · 64 km away
  8. 3.110km SE of Running Springs, CA · 27993 days ago · 19 km deep · 71 km away
  9. 2.512km SW of Marina del Rey, CA · 27981 days ago · 6 km deep · 84 km away
  10. 3.30km SE of Vincent, CA · 27981 days ago · 2 km deep · 90 km away
  11. 2.51km NNW of Fontana, CA · 27977 days ago · 0 km deep · 40 km away
  12. 2.45km WSW of Beaumont, CA · 27976 days ago · 8 km deep · 61 km away
  13. 2.011km N of Banning, CA · 27973 days ago · 18 km deep · 79 km away
  14. 2.636km WSW of Carlsbad, CA · 27973 days ago · 6 km deep · 84 km away
  15. 2.74km ENE of Cabazon, CA · 27970 days ago · 12 km deep · 85 km away
  16. 2.24km N of La Crescenta-Montrose, CA · 27966 days ago · 7 km deep · 75 km away
  17. 2.23km SW of Westwood, CA · 27959 days ago · 6 km deep · 78 km away
  18. 3.16km NW of Rancho Cucamonga, CA · 27951 days ago · 0 km deep · 43 km away

Before

  1. 2.612km SSW of San Pedro, CA · 28012 days ago · 6 km deep · 63 km away
  2. 3.510km W of Palos Verdes Estates, CA · 28013 days ago · 6 km deep · 78 km away
  3. 2.89km ESE of Running Springs, CA · 28013 days ago · 9 km deep · 73 km away
  4. 2.216km WSW of Manhattan Beach, CA · 28016 days ago · 6 km deep · 84 km away
  5. 2.62km NE of Commerce, CA · 28020 days ago · 14 km deep · 52 km away
  6. 3.92km SSE of Cudahy, CA · 28020 days ago · 3 km deep · 51 km away
  7. 2.618km W of Manhattan Beach, CA · 28021 days ago · 6 km deep · 87 km away
  8. 3.89km ENE of Yucaipa, CA · 28023 days ago · 0 km deep · 72 km away
  9. 2.312km NNW of Big Bear City, CA · 28027 days ago · 6 km deep · 96 km away
  10. 2.12km N of Pomona, CA · 28028 days ago · 0 km deep · 34 km away
  11. 2.78km W of Woodcrest, CA · 28029 days ago · 4 km deep · 24 km away
  12. 2.68km SSW of Lytle Creek, CA · 28031 days ago · 4 km deep · 47 km away
  13. 1.81km SSW of Artesia, CA · 28032 days ago · 0 km deep · 40 km away
  14. 1.81km SW of Westwood, CA · 28034 days ago · 6 km deep · 77 km away
  15. 2.83km SE of Marina del Rey, CA · 28037 days ago · 0 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3362288. Read Wed, Sep 30, 2026, 7:38 AM UTC.