California earthquakes

M2.7 earthquake 6km W of Norco, CA

A magnitude 2.7 earthquake struck 6km W of Norco, CA on Sat, Jun 22, 1946, 11:16 PM GMT-8 (07:16 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.9 9km SE of Valle Vista, CA. This one was a foreshock.

Norco 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
2.7 (ml), micro
Local time
UTC
1946-06-23 07:16:59 UTC
Depth
0.0 km (0.0 mi), shallow
Epicenter
33.930° N, 117.610° 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 2.2 km horizontally, 3.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
164°
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: 18 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 2.99km SE of Valle Vista, CA · 29310 days ago · 11 km deep · 77 km away
  2. 3.52km SSW of Woodcrest, CA · 29308 days ago · 7 km deep · 24 km away
  3. 2.68km N of Running Springs, CA · 29305 days ago · 12 km deep · 61 km away
  4. 2.13km NNW of West Hollywood, CA · 29305 days ago · 16 km deep · 73 km away
  5. 3.23km S of Pomona, CA · 29303 days ago · 0 km deep · 18 km away
  6. 2.56km N of Claremont, CA · 29301 days ago · 6 km deep · 26 km away
  7. 2.73km NNE of La Mirada, CA · 29301 days ago · 6 km deep · 36 km away
  8. 2.88km NNE of Running Springs, CA · 29300 days ago · 6 km deep · 61 km away
  9. 2.72km NE of Pomona, CA · 29299 days ago · 9 km deep · 20 km away
  10. 2.34km SSW of Lytle Creek, CA · 29281 days ago · 6 km deep · 34 km away
  11. 1.84km NNE of Hollywood, CA · 29279 days ago · 17 km deep · 68 km away
  12. 2.64km WNW of Muscoy, CA · 29278 days ago · 3 km deep · 33 km away
  13. 2.612km S of Newport Beach, CA · 29274 days ago · 6 km deep · 55 km away
  14. 2.32km SW of Buena Park, CA · 29273 days ago · 0 km deep · 38 km away
  15. 2.49km N of Claremont, CA · 29263 days ago · 4 km deep · 28 km away
  16. 3.017km ENE of Avalon, CA · 29263 days ago · 6 km deep · 77 km away
  17. 3.12km SSW of Wrightwood, CA · 29256 days ago · 6 km deep · 46 km away
  18. 3.011km NNE of Cabazon, CA · 29254 days ago · 6 km deep · 82 km away

Before

  1. 3.014km WNW of Morongo Valley, CA · 29312 days ago · 6 km deep · 86 km away
  2. 2.812km SW of Marina del Rey, CA · 29313 days ago · 6 km deep · 86 km away
  3. 2.96km N of Beaumont, CA · 29314 days ago · 0 km deep · 59 km away
  4. 2.24km NNW of Moreno Valley, CA · 29325 days ago · 13 km deep · 33 km away
  5. 3.26km N of Cabazon, CA · 29325 days ago · 6 km deep · 76 km away
  6. 2.78km NNE of Beaumont, CA · 29325 days ago · 6 km deep · 61 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3359645. Read Tue, Sep 22, 2026, 10:30 PM UTC.