California earthquakes

M2.0 earthquake 6 km W of Twain, California

A magnitude 2.0 earthquake struck 6 km W of Twain, California on Thu, Apr 17, 1986, 8:45 AM PST (16:45 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.8 7 km ESE of Milford, 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
1986-04-17 16:45:23 UTC
Depth
4.5 km (2.8 mi), shallow
Epicenter
40.016° N, 121.144° 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, 6.9 km in depth
Depth from
From location
Station coverage gap
228°, 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: 40 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.87 km ESE of Milford, California · 14779 days ago · 10 km deep · 73 km away
  2. 2.63 km ESE of Alleghany, California · 14778 days ago · -1 km deep · 69 km away
  3. 2.1Northern California · 14778 days ago · 11 km deep · 67 km away
  4. 2.13 km ENE of Alleghany, California · 14778 days ago · 14 km deep · 67 km away
  5. 2.17 km SSE of Washington, California · 14778 days ago · 4 km deep · 86 km away
  6. 2.013 km ESE of Mineral, California · 14777 days ago · 7 km deep · 40 km away
  7. 1.64 km ENE of Tobin, California · 14777 days ago · 4 km deep · 12 km away
  8. 2.32 km WSW of Plumas Eureka (historical), California · 14776 days ago · 4 km deep · 46 km away
  9. 2.13 km ENE of Alleghany, California · 14776 days ago · 13 km deep · 67 km away
  10. 1.96 km ENE of Mineral, California · 14770 days ago · 8 km deep · 52 km away
  11. 2.02 km ENE of Lake Almanor West, California · 14769 days ago · 6 km deep · 26 km away
  12. 1.97 km ESE of Magalia, California · 14768 days ago · 11 km deep · 39 km away
  13. 2.02 km E of Tobin, California · 14767 days ago · 3 km deep · 15 km away
  14. 1.618 km ENE of Willows, California · 14767 days ago · 4 km deep · 88 km away
  15. 1.70 km SSE of Meadow Valley, California · 14767 days ago · 3 km deep · 12 km away
  16. 1.9Northern California · 14764 days ago · 5 km deep · 33 km away
  17. 2.56 km WNW of Palermo, California · 14762 days ago · 22 km deep · 74 km away
  18. 2.32 km E of Storrie, California · 14759 days ago · 4 km deep · 17 km away
  19. 2.88 km NNW of Chester, California · 14759 days ago · 8 km deep · 41 km away
  20. 1.85 km W of Cherokee, California · 14759 days ago · 5 km deep · 57 km away
  21. 1.613 km WNW of Paynes Creek, California · 14759 days ago · 23 km deep · 87 km away
  22. 1.95 km W of Twain, California · 14758 days ago · 8 km deep · 1 km away
  23. 2.61 km W of Berry Creek, California · 14757 days ago · 5 km deep · 48 km away
  24. 2.312 km SSE of Sierraville, California · 14757 days ago · -1 km deep · 91 km away
  25. 1.61 km NNE of Thermalito, California · 14757 days ago · 1 km deep · 66 km away
  26. 2.49 km SSE of Stirling City, California · 14756 days ago · 4 km deep · 34 km away
  27. 1.78 km N of Chester, California · 14754 days ago · 1 km deep · 42 km away
  28. 1.73 km W of Greenville, California · 14750 days ago · 4 km deep · 19 km away
  29. 2.512 km SE of Bucks Lake, California · 14749 days ago · 6 km deep · 25 km away
  30. 1.520 km NE of Shingletown, California · 14749 days ago · 3 km deep · 86 km away
  31. 2.83 km ESE of South Oroville, California · 14745 days ago · 0 km deep · 67 km away
  32. 1.99 km WNW of Chester, California · 14743 days ago · -2 km deep · 39 km away
  33. 1.712 km WSW of Chester, California · 14738 days ago · 3 km deep · 36 km away
  34. 2.46 km E of Orland, California · 14737 days ago · 4 km deep · 88 km away
  35. 1.89 km NNW of Old Station, California · 14734 days ago · 4 km deep · 86 km away
  36. 2.16 km ESE of Sierraville, California · 14729 days ago · -1 km deep · 87 km away
  37. 1.913 km E of Cottonwood, California · 14728 days ago · 4 km deep · 92 km away
  38. 1.714 km ESE of Mineral, California · 14725 days ago · 6 km deep · 39 km away
  39. 2.415km WNW of Susanville, CA · 14720 days ago · 10 km deep · 58 km away
  40. 2.215 km WNW of Susanville, California · 14720 days ago · 4 km deep · 57 km away

Before

  1. 1.9Northern California · 14780 days ago · 4 km deep · 67 km away
  2. 2.33 km ENE of Alleghany, California · 14781 days ago · 12 km deep · 66 km away
  3. 2.13 km ENE of Alleghany, California · 14781 days ago · 12 km deep · 66 km away
  4. 1.93 km ENE of Alleghany, California · 14781 days ago · 16 km deep · 66 km away
  5. 1.65 km NE of Alleghany, California · 14781 days ago · 4 km deep · 64 km away
  6. 2.35 km ENE of Sierra City, California · 14783 days ago · 4 km deep · 68 km away
  7. 2.17 km WNW of Cohasset, California · 14787 days ago · 4 km deep · 58 km away
  8. 2.34 km ESE of East Quincy, California · 14789 days ago · 3 km deep · 27 km away
  9. 1.610 km ESE of Cottonwood, California · 14792 days ago · 21 km deep · 95 km away
  10. 2.216 km N of Princeton, California · 14794 days ago · 5 km deep · 89 km away
  11. 2.4Northern California · 14794 days ago · 3 km deep · 17 km away
  12. 2.18 km NNE of Dobbins, California · 14795 days ago · 10 km deep · 64 km away
  13. 2.22 km SSW of Storrie, California · 14802 days ago · 4 km deep · 21 km away
  14. 2.04 km SW of La Porte, California · 14808 days ago · 7 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc10084580. Read Sat, Oct 3, 2026, 9:35 AM UTC.