California earthquakes

M2.8 earthquake 16 km NE of Upper Lake, California

A magnitude 2.8 earthquake struck 16 km NE of Upper Lake, California on Tue, Mar 10, 1987, 2:12 PM PST (22:12 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.0 5 km WSW 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
2.8 (md), micro
Local time
UTC
1987-03-10 22:12:26 UTC
Depth
3.3 km (2.1 mi), shallow
Epicenter
39.281° N, 122.787° 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 0.1 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
69°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 173 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.75 km WNW of Cobb, California · 14425 days ago · 1 km deep · 49 km away
  2. 1.89 km ESE of Hidden Valley Lake, California · 14425 days ago · 5 km deep · 63 km away
  3. 1.81 km WSW of Hopland, California · 14425 days ago · 0 km deep · 46 km away
  4. 1.59 km NW of Cobb, California · 14424 days ago · 1 km deep · 44 km away
  5. 2.33 km NE of Anchor Bay, California · 14424 days ago · 0 km deep · 84 km away
  6. 1.86 km W of Cobb, California · 14424 days ago · 3 km deep · 51 km away
  7. 1.6Northern California · 14423 days ago · 0 km deep · 54 km away
  8. 1.77 km W of Cobb, California · 14423 days ago · 3 km deep · 52 km away
  9. 1.65 km WSW of Cobb, California · 14423 days ago · 0 km deep · 54 km away
  10. 1.58 km W of Cobb, California · 14423 days ago · 1 km deep · 51 km away
  11. 1.70 km SSW of Larkfield-Wikiup, California · 14423 days ago · 0 km deep · 86 km away
  12. 3.05 km WSW of Cobb, California · 14423 days ago · 1 km deep · 54 km away
  13. 2.133 km SE of Ruth, California · 14423 days ago · -1 km deep · 92 km away
  14. 2.16 km WSW of Cobb, California · 14422 days ago · 0 km deep · 54 km away
  15. 2.54 km WSW of Cobb, California · 14422 days ago · -1 km deep · 53 km away
  16. 2.06 km WSW of Cobb, California · 14422 days ago · 0 km deep · 54 km away
  17. 1.55 km SW of Cobb, California · 14422 days ago · 2 km deep · 55 km away
  18. 2.95 km SW of Cobb, California · 14422 days ago · 3 km deep · 55 km away
  19. 1.95 km SW of Cobb, California · 14421 days ago · 1 km deep · 55 km away
  20. 1.76 km W of Cobb, California · 14420 days ago · 3 km deep · 52 km away
  21. 2.626 km SE of Ruth, California · 14420 days ago · 42 km deep · 98 km away
  22. 2.615 km W of Guinda, California · 14420 days ago · -1 km deep · 63 km away
  23. 1.64 km ESE of Boonville, CA · 14420 days ago · 4 km deep · 56 km away
  24. 1.84 km ESE of Boonville, California · 14420 days ago · 5 km deep · 56 km away
  25. 1.63 km ESE of Boonville, California · 14419 days ago · 5 km deep · 56 km away
  26. 2.96 km WSW of Cobb, California · 14419 days ago · 4 km deep · 53 km away
  27. 2.06 km SW of Cobb, California · 14419 days ago · -1 km deep · 55 km away
  28. 1.77 km W of Cobb, California · 14419 days ago · 0 km deep · 52 km away
  29. 1.67 km W of Cobb, California · 14418 days ago · 2 km deep · 51 km away
  30. 1.613 km ESE of Hidden Valley Lake, California · 14418 days ago · 3 km deep · 67 km away
  31. 2.16 km W of Cobb, California · 14417 days ago · 4 km deep · 51 km away
  32. 1.79 km W of Cobb, California · 14417 days ago · 0 km deep · 51 km away
  33. 1.84 km WSW of Cobb, California · 14416 days ago · 1 km deep · 54 km away
  34. 1.68 km W of Cobb, California · 14416 days ago · 1 km deep · 50 km away
  35. 1.64 km WSW of Cobb, California · 14416 days ago · 0 km deep · 54 km away
  36. 1.66 km SW of Cobb, California · 14415 days ago · 1 km deep · 55 km away
  37. 1.94 km WSW of Cobb, California · 14414 days ago · 2 km deep · 53 km away
  38. 1.76 km W of Cobb, California · 14413 days ago · 3 km deep · 51 km away
  39. 1.57 km WSW of Cobb, California · 14413 days ago · 3 km deep · 54 km away
  40. 1.66 km W of Cobb, California · 14413 days ago · 3 km deep · 51 km away
  41. 1.68 km WSW of Cobb, California · 14413 days ago · 3 km deep · 55 km away
  42. 1.65 km SW of Cobb, California · 14413 days ago · 0 km deep · 55 km away
  43. 1.611 km S of Kelseyville, California · 14412 days ago · 0 km deep · 45 km away
  44. 2.45 km WNW of Cobb, California · 14412 days ago · 1 km deep · 50 km away
  45. 1.8Northern California · 14412 days ago · 6 km deep · 79 km away
  46. 2.69 km SE of Covelo, California · 14411 days ago · 1 km deep · 60 km away
  47. 2.96 km ENE of Willits, California · 14411 days ago · 4 km deep · 46 km away
  48. 1.76 km ENE of Willits, California · 14411 days ago · 3 km deep · 46 km away
  49. 1.56 km ENE of Willits, California · 14411 days ago · 4 km deep · 46 km away
  50. 2.86 km ENE of Willits, California · 14411 days ago · 3 km deep · 46 km away
  51. 2.56 km ENE of Willits, California · 14411 days ago · 3 km deep · 46 km away
  52. 2.36 km ENE of Willits, California · 14411 days ago · 3 km deep · 46 km away
  53. 1.76 km ENE of Willits, California · 14411 days ago · 3 km deep · 46 km away
  54. 1.83 km SW of Cobb, California · 14411 days ago · 0 km deep · 54 km away
  55. 1.720 km ENE of Potter Valley, California · 14411 days ago · 7 km deep · 16 km away
  56. 1.67 km ENE of Talmage, California · 14411 days ago · 4 km deep · 29 km away
  57. 1.64 km WSW of Cobb, California · 14410 days ago · 2 km deep · 52 km away
  58. 2.66 km W of Cobb, California · 14409 days ago · 3 km deep · 51 km away
  59. 2.47 km W of Cobb, California · 14409 days ago · 1 km deep · 50 km away
  60. 1.88 km SW of Laytonville, California · 14409 days ago · 5 km deep · 75 km away

The first 60 of 173.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc96429. Read Tue, Sep 22, 2026, 9:35 PM UTC.