California earthquakes

M1.9 earthquake 1 km SSW of Twain, California

A magnitude 1.9 earthquake struck 1 km SSW of Twain, California on Sat, Feb 12, 1983, 2:56 PM PST (22:56 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.0 1 km N of Keddie, California. This one was a foreshock.

Quincy 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
1.9 (md), micro
Local time
UTC
1983-02-12 22:56:59 UTC
Depth
3.2 km (2.0 mi), shallow
Epicenter
40.004° N, 121.079° 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 2.8 km horizontally, 6.5 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
306°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 39 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.01 km N of Keddie, California · 15928 days ago · 4 km deep · 10 km away
  2. 1.911 km NE of Soda Springs, California · 15926 days ago · 4 km deep · 95 km away
  3. 2.78 km SSW of Kingvale, California · 15925 days ago · 20 km deep · 100 km away
  4. 2.36 km S of Oroville East, California · 15922 days ago · 7 km deep · 69 km away
  5. 2.33 km ESE of Palermo, California · 15922 days ago · 8 km deep · 74 km away
  6. 2.018 km SW of Old Station, California · 15920 days ago · 0 km deep · 72 km away
  7. 2.19 km W of Verdi, California · 15919 days ago · 13 km deep · 97 km away
  8. 1.83 km N of Lake Almanor West, California · 15916 days ago · 3 km deep · 31 km away
  9. 1.90 km ENE of Chester, California · 15915 days ago · -1 km deep · 36 km away
  10. 2.35 km W of Greenville, California · 15914 days ago · -2 km deep · 16 km away
  11. 1.911 km NE of Soda Springs, California · 15904 days ago · 4 km deep · 95 km away
  12. 2.24 km N of Beckwourth, California · 15901 days ago · 0 km deep · 61 km away
  13. 2.34 km ESE of Chester, California · 15897 days ago · 8 km deep · 33 km away
  14. 3.010 km SE of Bend, California · 15895 days ago · 17 km deep · 91 km away
  15. 2.03 km NNE of Old Station, California · 15894 days ago · 2 km deep · 83 km away
  16. 1.73 km NNE of Old Station, California · 15894 days ago · 3 km deep · 83 km away
  17. 1.84 km S of Chester, California · 15894 days ago · 3 km deep · 32 km away
  18. 2.37 km WNW of Hamilton City, California · 15894 days ago · 16 km deep · 90 km away
  19. 1.59 km SSW of Paradise, California · 15892 days ago · 13 km deep · 61 km away
  20. 2.2Northern California · 15890 days ago · 7 km deep · 67 km away
  21. 1.715 km WSW of Chester, California · 15889 days ago · 1 km deep · 38 km away
  22. 2.610 km N of Truckee, California · 15889 days ago · 10 km deep · 99 km away
  23. 2.313 km N of Soda Springs, California · 15888 days ago · 0 km deep · 88 km away
  24. 2.3Northern California · 15888 days ago · 7 km deep · 91 km away
  25. 2.27 km NNE of Belden, California · 15884 days ago · 4 km deep · 12 km away
  26. 2.0Northern California · 15881 days ago · 5 km deep · 97 km away
  27. 2.49 km NNW of Truckee, California · 15878 days ago · 12 km deep · 99 km away
  28. 2.311 km NW of Kingvale, California · 15878 days ago · 4 km deep · 83 km away
  29. 2.910 km N of Princeton, California · 15876 days ago · 23 km deep · 97 km away
  30. 1.58 km SSE of Mineral, California · 15876 days ago · 2 km deep · 50 km away
  31. 1.85 km WSW of Butte Meadows, California · 15875 days ago · 4 km deep · 46 km away
  32. 2.99 km SW of Plumas Eureka (historical), California · 15875 days ago · 23 km deep · 44 km away
  33. 2.56 km WSW of Plumas Eureka (historical), California · 15874 days ago · 0 km deep · 40 km away
  34. 1.813 km SSW of Mineral, California · 15873 days ago · -1 km deep · 53 km away
  35. 1.911 km S of Mineral, California · 15872 days ago · -1 km deep · 50 km away
  36. 2.13 km NNW of Lake Almanor West, California · 15872 days ago · 4 km deep · 32 km away
  37. 1.716 km S of Hamilton City, California · 15872 days ago · 24 km deep · 90 km away
  38. 2.28 km NNW of Truckee, California · 15871 days ago · 10 km deep · 100 km away
  39. 2.34 km WNW of Nord, California · 15871 days ago · 11 km deep · 83 km away

Before

  1. 1.81 km SSE of Twain, California · 15928 days ago · 3 km deep · 1 km away
  2. 2.54 km SSE of Canyondam, California · 15935 days ago · 5 km deep · 14 km away
  3. 2.0Northern California · 15940 days ago · 4 km deep · 39 km away
  4. 2.111 km SW of Kingvale, California · 15944 days ago · 10 km deep · 97 km away
  5. 1.94 km WNW of Dobbins, California · 15944 days ago · 17 km deep · 70 km away
  6. 1.811 km SE of Millville, California · 15947 days ago · 1 km deep · 100 km away
  7. 2.16 km ESE of Palermo, California · 15953 days ago · 0 km deep · 74 km away
  8. 1.99 km S of Hamilton City, California · 15956 days ago · 18 km deep · 89 km away
  9. 2.310 km NNW of Kingvale, California · 15957 days ago · 7 km deep · 84 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1087769. Read Tue, Sep 22, 2026, 8:51 PM UTC.