California earthquakes

M2.0 earthquake 21 km NNE of Upper Lake, California

A magnitude 2.0 earthquake struck 21 km NNE of Upper Lake, California on Sat, Aug 3, 1985, 10:27 AM PDT (17:27 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.0 5 km SW of Cobb, California. This one was a foreshock.

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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
1985-08-03 17:27:43 UTC
Depth
6.4 km (4.0 mi), shallow
Epicenter
39.352° N, 122.855° 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 0.3 km horizontally, 1.8 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
82°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 185 in the 60 days after this one and 94 in the 30 days before it.

After

  1. 1.86 km E of Calpella, California · 15034 days ago · 5 km deep · 26 km away
  2. 1.53 km SSW of Cobb, California · 15033 days ago · 1 km deep · 63 km away
  3. 2.87 km W of Cobb, California · 15033 days ago · 3 km deep · 60 km away
  4. 2.26 km WSW of Cobb, California · 15031 days ago · 0 km deep · 62 km away
  5. 3.27 km W of Cobb, California · 15031 days ago · 1 km deep · 59 km away
  6. 2.14 km WSW of Cobb, California · 15030 days ago · 1 km deep · 61 km away
  7. 2.015 km SW of Paskenta, California · 15030 days ago · 6 km deep · 52 km away
  8. 1.910 km SW of Williams, California · 15030 days ago · 15 km deep · 60 km away
  9. 1.66 km WSW of Cobb, California · 15030 days ago · 0 km deep · 62 km away
  10. 1.56 km W of Covelo, California · 15030 days ago · 6 km deep · 64 km away
  11. 2.34 km NNE of Boonville, California · 15029 days ago · 4 km deep · 54 km away
  12. 1.66 km SW of Cobb, California · 15029 days ago · 0 km deep · 64 km away
  13. 3.25 km SW of Cobb, California · 15029 days ago · 2 km deep · 63 km away
  14. 4.05 km SW of Cobb, California · 15029 days ago · -1 km deep · 63 km away
  15. 2.15 km SW of Cobb, California · 15029 days ago · 0 km deep · 63 km away
  16. 2.14 km NW of Redwood Valley, California · 15028 days ago · 5 km deep · 34 km away
  17. 1.64 km WSW of Cobb, California · 15028 days ago · 1 km deep · 62 km away
  18. 2.08 km SSW of Colusa, California · 15028 days ago · 6 km deep · 73 km away
  19. 2.16 km W of Cobb, California · 15027 days ago · 3 km deep · 59 km away
  20. 1.96 km W of Cobb, California · 15027 days ago · 1 km deep · 59 km away
  21. 2.16 km W of Cobb, California · 15027 days ago · 0 km deep · 59 km away
  22. 1.58 km WSW of Cobb, California · 15027 days ago · 4 km deep · 61 km away
  23. 1.713 km N of Brooktrails, California · 15027 days ago · 6 km deep · 50 km away
  24. 1.94 km W of Cobb, California · 15027 days ago · 0 km deep · 60 km away
  25. 1.85 km WNW of Cobb, California · 15025 days ago · 2 km deep · 56 km away
  26. 2.19 km E of Hidden Valley Lake, California · 15025 days ago · 7 km deep · 69 km away
  27. 1.84 km S of Hamilton City, California · 15024 days ago · 5 km deep · 82 km away
  28. 1.77 km W of Cobb, California · 15024 days ago · 0 km deep · 60 km away
  29. 2.39 km SE of Rancho Tehama Reserve, California · 15024 days ago · 5 km deep · 82 km away
  30. 2.19 km WSW of Cobb, California · 15024 days ago · 1 km deep · 61 km away
  31. 1.56 km W of Cobb, California · 15024 days ago · 3 km deep · 59 km away
  32. 2.67 km WSW of Cobb, California · 15023 days ago · 0 km deep · 61 km away
  33. 2.67 km W of Cobb, California · 15023 days ago · 3 km deep · 60 km away
  34. 1.67 km WSW of Cobb, California · 15023 days ago · 0 km deep · 61 km away
  35. 2.16 km WSW of Cobb, California · 15023 days ago · 4 km deep · 61 km away
  36. 1.90 km ESE of Redwood Valley, California · 15022 days ago · 6 km deep · 31 km away
  37. 1.69 km NE of Hopland, California · 15022 days ago · 6 km deep · 39 km away
  38. 2.05 km SW of Cobb, California · 15022 days ago · 2 km deep · 63 km away
  39. 2.08 km WSW of Cobb, California · 15021 days ago · 4 km deep · 62 km away
  40. 2.16 km W of Cobb, California · 15020 days ago · 1 km deep · 59 km away
  41. 2.022 km WSW of Williams, California · 15020 days ago · 3 km deep · 48 km away
  42. 1.613 km ENE of Clearlake Oaks, California · 15020 days ago · 5 km deep · 44 km away
  43. 2.03 km W of Cobb, California · 15019 days ago · 0 km deep · 59 km away
  44. 1.52 km NNW of Clearlake, California · 15019 days ago · 2 km deep · 45 km away
  45. 1.97 km W of Cobb, California · 15018 days ago · 3 km deep · 60 km away
  46. 1.910 km SE of Hopland, California · 15018 days ago · 29 km deep · 52 km away
  47. 1.87 km W of Cobb, California · 15018 days ago · 3 km deep · 59 km away
  48. 1.86 km W of Cobb, California · 15018 days ago · 3 km deep · 59 km away
  49. 1.66 km NNE of Cloverdale, California · 15018 days ago · 5 km deep · 56 km away
  50. 1.66 km WNW of Cobb, California · 15017 days ago · 1 km deep · 58 km away
  51. 2.09 km SSE of Willits, California · 15017 days ago · 6 km deep · 39 km away
  52. 2.35 km W of Cobb, California · 15017 days ago · -1 km deep · 59 km away
  53. 2.26 km NW of Cobb, California · 15016 days ago · -1 km deep · 55 km away
  54. 2.85 km W of Cobb, California · 15016 days ago · 1 km deep · 58 km away
  55. 1.65 km WSW of Cobb, California · 15016 days ago · 1 km deep · 60 km away
  56. 1.76 km NE of Brooktrails, California · 15015 days ago · 7 km deep · 43 km away
  57. 1.55 km SW of Cobb, California · 15015 days ago · 1 km deep · 64 km away
  58. 1.55 km WSW of Cobb, California · 15015 days ago · 0 km deep · 62 km away
  59. 1.85 km WSW of Cobb, California · 15015 days ago · 0 km deep · 62 km away
  60. 2.07 km W of Cobb, California · 15015 days ago · 3 km deep · 59 km away

The first 60 of 185.

Before

  1. 1.65 km WSW of Hopland, California · 15035 days ago · 5 km deep · 53 km away
  2. 1.931 km W of Paskenta, California · 15035 days ago · -1 km deep · 63 km away
  3. 1.76 km W of Cobb, California · 15036 days ago · 3 km deep · 60 km away
  4. 1.55 km W of Cobb, California · 15036 days ago · 0 km deep · 58 km away
  5. 1.50 km SW of Redwood Valley, California · 15036 days ago · 4 km deep · 32 km away
  6. 2.80 km NNE of Redwood Valley, California · 15036 days ago · 6 km deep · 31 km away
  7. 1.60 km WSW of Redwood Valley, California · 15036 days ago · 7 km deep · 32 km away
  8. 1.811 km NE of Potter Valley, California · 15036 days ago · 1 km deep · 16 km away
  9. 1.70 km SSE of Redwood Valley, California · 15036 days ago · 6 km deep · 32 km away
  10. 1.74 km E of Cloverdale, California · 15037 days ago · 22 km deep · 61 km away
  11. 1.78 km W of Cobb, California · 15037 days ago · 0 km deep · 58 km away
  12. 1.610 km W of Cobb, California · 15037 days ago · 2 km deep · 61 km away
  13. 3.313 km N of Princeton, California · 15038 days ago · 12 km deep · 75 km away
  14. 1.624 km WNW of Elk Creek, California · 15038 days ago · 4 km deep · 42 km away
  15. 2.324 km WNW of Elk Creek, California · 15038 days ago · 2 km deep · 41 km away
  16. 1.76 km WSW of Cobb, California · 15039 days ago · 0 km deep · 62 km away
  17. 3.35 km WSW of Cobb, California · 15039 days ago · 0 km deep · 62 km away
  18. 2.15 km WSW of Cobb, California · 15039 days ago · 0 km deep · 62 km away
  19. 2.125 km WNW of Elk Creek, California · 15039 days ago · 4 km deep · 40 km away
  20. 1.67 km W of Cobb, California · 15039 days ago · 3 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1130195. Read Thu, Oct 1, 2026, 1:19 PM UTC.