California earthquakes

M2.0 earthquake 0 km SSW of Twain, California

A magnitude 2.0 earthquake struck 0 km SSW of Twain, California on Wed, Jan 9, 1985, 12:45 AM PST (08:45 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M3.3 8 km NW of Old Station, 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
2.0 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1985-01-09 08:45:27 UTC
Depth
7.5 km (4.6 mi), shallow
Epicenter
40.014° N, 121.077° 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 0.6 km horizontally, 7.3 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
197°, poorly surrounded by stations
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 22 in the 30 days before it.

After

  1. 1.65 km SE of Sierraville, California · 15239 days ago · -1 km deep · 82 km away
  2. 1.6Northern California · 15232 days ago · 10 km deep · 95 km away
  3. 2.314 km NNW of Truckee, California · 15227 days ago · 10 km deep · 94 km away
  4. 2.03 km NNE of Lake Almanor West, California · 15227 days ago · 6 km deep · 30 km away
  5. 1.63 km ENE of Loma Rica, California · 15216 days ago · 1 km deep · 81 km away
  6. 1.512 km W of Chester, California · 15214 days ago · 3 km deep · 40 km away
  7. 1.64 km ESE of Palermo, California · 15214 days ago · 9 km deep · 75 km away
  8. 1.83 km NNW of Lake Almanor West, California · 15210 days ago · 3 km deep · 31 km away
  9. 2.225 km S of Nubieber, California · 15209 days ago · 4 km deep · 95 km away
  10. 1.72 km N of Lake Almanor West, California · 15208 days ago · 6 km deep · 29 km away
  11. 3.38 km NW of Old Station, California · 15204 days ago · 9 km deep · 87 km away
  12. 1.816 km ENE of Mineral, California · 15204 days ago · 6 km deep · 54 km away
  13. 1.8Northern California · 15204 days ago · 10 km deep · 88 km away
  14. 2.317 km ENE of Mineral, California · 15204 days ago · 6 km deep · 54 km away
  15. 1.617 km ENE of Mineral, California · 15204 days ago · 8 km deep · 55 km away
  16. 2.316 km ENE of Mineral, California · 15204 days ago · 3 km deep · 53 km away
  17. 1.817 km ENE of Mineral, California · 15204 days ago · 7 km deep · 54 km away
  18. 2.115 km NNE of Shingletown, California · 15201 days ago · 13 km deep · 92 km away
  19. 2.015 km SW of Lake Almanor West, California · 15198 days ago · 8 km deep · 25 km away
  20. 1.921 km S of Nubieber, California · 15197 days ago · 13 km deep · 99 km away
  21. 1.714 km NNE of Mineral, California · 15191 days ago · 3 km deep · 63 km away
  22. 2.53 km N of Plumas Eureka, California · 15188 days ago · -1 km deep · 42 km away
  23. 2.53 km S of Graeagle, California · 15187 days ago · 4 km deep · 49 km away
  24. 2.21 km NNW of Plumas Eureka, California · 15184 days ago · 3 km deep · 43 km away
  25. 1.513 km NE of Butte Meadows, California · 15184 days ago · 2 km deep · 37 km away

Before

  1. 1.810 km WNW of Paynes Creek, California · 15244 days ago · 4 km deep · 90 km away
  2. 3.012 km W of Paynes Creek, California · 15244 days ago · 17 km deep · 92 km away
  3. 1.84 km WSW of Cromberg, California · 15246 days ago · 5 km deep · 35 km away
  4. 1.94 km SSE of Sierraville, California · 15246 days ago · 0 km deep · 81 km away
  5. 1.615 km E of Cottonwood, California · 15248 days ago · 7 km deep · 96 km away
  6. 1.67 km SE of Hamilton City, California · 15248 days ago · 5 km deep · 83 km away
  7. 2.016 km WNW of Paynes Creek, California · 15248 days ago · 18 km deep · 96 km away
  8. 1.94 km NNW of Alta Sierra, California · 15249 days ago · 10 km deep · 93 km away
  9. 2.312 km NE of Proberta, California · 15249 days ago · 12 km deep · 84 km away
  10. 1.511 km WSW of Chester, California · 15250 days ago · 5 km deep · 38 km away
  11. 1.912 km E of Cottonwood, California · 15253 days ago · 18 km deep · 98 km away
  12. 1.69 km WSW of Manton, California · 15257 days ago · 5 km deep · 88 km away
  13. 2.01 km NE of Greenhorn, California · 15258 days ago · 8 km deep · 31 km away
  14. 1.812 km SW of Durham, California · 15259 days ago · 18 km deep · 86 km away
  15. 1.913 km E of Cottonwood, California · 15261 days ago · 13 km deep · 98 km away
  16. 1.614 km NNE of Mineral, California · 15263 days ago · 3 km deep · 65 km away
  17. 1.715 km N of Westwood, California · 15263 days ago · -2 km deep · 49 km away
  18. 2.32 km WSW of La Porte, California · 15265 days ago · 17 km deep · 38 km away
  19. 2.49 km E of Sierra City, California · 15267 days ago · -1 km deep · 70 km away
  20. 1.7Northern California · 15268 days ago · 4 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc36794. Read Sun, Oct 4, 2026, 12:12 PM UTC.