California earthquakes

M1.8 earthquake 19 km NNE of Upper Lake, California

A magnitude 1.8 earthquake struck 19 km NNE of Upper Lake, California on Thu, Mar 21, 1985, 10:21 PM PST (06:21 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M1.9 5 km SW of Cobb, California. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.8 (md), micro
Local time
UTC
1985-03-22 06:21:02 UTC
Depth
0.2 km (0.1 mi), shallow
Epicenter
39.326° N, 122.821° 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, 8.5 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
81°
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: 181 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.95 km SW of Cobb, California · 15146 days ago · 0 km deep · 60 km away
  2. 2.219 km WSW of Williams, California · 15146 days ago · 4 km deep · 45 km away
  3. 2.120 km WSW of Williams, California · 15146 days ago · 2 km deep · 45 km away
  4. 2.18 km WSW of Cobb, California · 15146 days ago · 3 km deep · 59 km away
  5. 1.76 km W of Cobb, California · 15146 days ago · 3 km deep · 56 km away
  6. 1.97 km WSW of Cobb, California · 15145 days ago · 1 km deep · 59 km away
  7. 1.94 km N of Larkfield-Wikiup, California · 15145 days ago · 3 km deep · 86 km away
  8. 2.67 km WSW of Cobb, California · 15145 days ago · 0 km deep · 58 km away
  9. 2.27 km NNE of Elk Creek, California · 15145 days ago · 12 km deep · 46 km away
  10. 1.68 km W of Cobb, California · 15144 days ago · 1 km deep · 57 km away
  11. 2.04 km NNW of Larkfield-Wikiup, California · 15144 days ago · 3 km deep · 86 km away
  12. 1.94 km W of Cobb, CA · 15144 days ago · 0 km deep · 56 km away
  13. 2.09 km N of Upper Lake, California · 15144 days ago · 4 km deep · 11 km away
  14. 2.63 km SSE of Clear Lake Riviera, California · 15144 days ago · 2 km deep · 46 km away
  15. 1.72 km SSE of Clear Lake Riviera, California · 15144 days ago · 1 km deep · 45 km away
  16. 1.56 km WSW of Cobb, California · 15144 days ago · 0 km deep · 57 km away
  17. 2.15 km WSW of Cobb, California · 15144 days ago · 1 km deep · 57 km away
  18. 1.66 km WSW of Cobb, California · 15143 days ago · -1 km deep · 58 km away
  19. 1.75 km W of Cobb, California · 15143 days ago · 1 km deep · 56 km away
  20. 3.114 km N of Brooktrails, California · 15143 days ago · -1 km deep · 54 km away
  21. 1.820 km WSW of Williams, California · 15143 days ago · 4 km deep · 45 km away
  22. 2.55 km N of Windsor, California · 15142 days ago · 5 km deep · 81 km away
  23. 3.16 km W of Cobb, California · 15142 days ago · 4 km deep · 56 km away
  24. 1.78 km W of Cobb, California · 15142 days ago · 0 km deep · 57 km away
  25. 1.96 km W of Cobb, California · 15142 days ago · 0 km deep · 56 km away
  26. 2.15 km SW of Cobb, California · 15142 days ago · 1 km deep · 60 km away
  27. 1.76 km W of Cobb, California · 15141 days ago · 3 km deep · 56 km away
  28. 1.96 km W of Cobb, California · 15141 days ago · 3 km deep · 57 km away
  29. 2.26 km W of Cobb, California · 15141 days ago · 3 km deep · 56 km away
  30. 3.26 km WSW of Cobb, California · 15141 days ago · 4 km deep · 58 km away
  31. 2.16 km WSW of Cobb, California · 15141 days ago · 3 km deep · 58 km away
  32. 1.56 km WSW of Cobb, California · 15141 days ago · 4 km deep · 58 km away
  33. 1.513 km ESE of Hidden Valley Lake, California · 15141 days ago · 5 km deep · 73 km away
  34. 2.08 km WSW of Cobb, California · 15141 days ago · 4 km deep · 60 km away
  35. 1.67 km WSW of Cobb, California · 15141 days ago · 1 km deep · 58 km away
  36. 2.516 km NNE of Elk Creek, California · 15140 days ago · 0 km deep · 56 km away
  37. 2.24 km SW of Cobb, California · 15140 days ago · 1 km deep · 60 km away
  38. 2.29 km WSW of Cobb, California · 15140 days ago · 1 km deep · 59 km away
  39. 1.74 km WSW of Laytonville, California · 15139 days ago · 4 km deep · 71 km away
  40. 2.311 km SSE of Laytonville, California · 15138 days ago · 7 km deep · 60 km away
  41. 2.67 km WSW of Cobb, California · 15138 days ago · 1 km deep · 58 km away
  42. 2.57 km WSW of Cobb, California · 15138 days ago · 1 km deep · 58 km away
  43. 3.45 km SW of Cobb, California · 15137 days ago · 1 km deep · 60 km away
  44. 2.55 km SW of Cobb, California · 15137 days ago · 1 km deep · 60 km away
  45. 1.615 km WSW of Laytonville, California · 15137 days ago · 3 km deep · 80 km away
  46. 1.67 km WSW of Cobb, California · 15137 days ago · 3 km deep · 59 km away
  47. 1.75 km W of Cobb, California · 15136 days ago · 4 km deep · 56 km away
  48. 2.23 km SW of Cobb, California · 15136 days ago · 1 km deep · 59 km away
  49. 2.0Northern California · 15136 days ago · 1 km deep · 58 km away
  50. 2.08 km WSW of Cobb, California · 15136 days ago · 3 km deep · 58 km away
  51. 2.58 km WNW of Guinda, California · 15135 days ago · 2 km deep · 70 km away
  52. 2.07 km NE of Covelo, California · 15135 days ago · 5 km deep · 65 km away
  53. 2.47 km WNW of Guinda, California · 15135 days ago · 1 km deep · 70 km away
  54. 2.28 km WSW of Cobb, California · 15135 days ago · 0 km deep · 58 km away
  55. 1.918 km NE of Upper Lake, California · 15134 days ago · 7 km deep · 5 km away
  56. 2.38 km WSW of Cobb, California · 15134 days ago · 3 km deep · 58 km away
  57. 1.710 km SSE of Laytonville, California · 15133 days ago · 7 km deep · 60 km away
  58. 2.0Northern California · 15133 days ago · 1 km deep · 57 km away
  59. 2.17 km NNW of Richvale, California · 15133 days ago · 5 km deep · 93 km away
  60. 2.07 km W of Cobb, California · 15132 days ago · 1 km deep · 56 km away

The first 60 of 181.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc45213. Read Tue, Sep 22, 2026, 10:53 AM UTC.