California earthquakes

M1.8 earthquake 10 km NE of Angwin, California

A magnitude 1.8 earthquake struck 10 km NE of Angwin, California on Tue, Sep 11, 1990, 5:59 AM PDT (12:59 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.5 0 km SW of Crockett, 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-09-11 12:59:36 UTC
Depth
4.4 km (2.7 mi), shallow
Epicenter
38.638° N, 122.363° 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 0.7 km horizontally, 1.7 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
84°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 156 in the 60 days after this one and 68 in the 30 days before it.

After

  1. 1.89 km W of Cobb, California · 13170 days ago · 0 km deep · 45 km away
  2. 2.24 km SW of Cobb, California · 13170 days ago · 2 km deep · 39 km away
  3. 1.64 km ENE of Saint Helena, California · 13170 days ago · 13 km deep · 14 km away
  4. 1.86 km S of Cobb, California · 13169 days ago · 1 km deep · 34 km away
  5. 1.64 km W of Cobb, California · 13168 days ago · 0 km deep · 40 km away
  6. 1.64 km W of Cobb, California · 13168 days ago · 0 km deep · 41 km away
  7. 1.56 km ESE of Hopland, California · 13168 days ago · 4 km deep · 68 km away
  8. 1.69 km W of Cobb, California · 13168 days ago · 1 km deep · 46 km away
  9. 1.510 km NE of Blackhawk, California · 13167 days ago · 7 km deep · 96 km away
  10. 1.96 km ESE of Hopland, California · 13167 days ago · 0 km deep · 68 km away
  11. 1.62 km E of North Gate, California · 13164 days ago · 8 km deep · 88 km away
  12. 3.45 km SW of Cobb, California · 13164 days ago · 0 km deep · 39 km away
  13. 2.59 km WNW of Cobb, California · 13163 days ago · 2 km deep · 46 km away
  14. 1.78 km W of Cobb, California · 13163 days ago · 2 km deep · 45 km away
  15. 2.09 km ESE of Hidden Valley Lake, California · 13163 days ago · 5 km deep · 17 km away
  16. 1.85 km W of Cobb, California · 13163 days ago · 1 km deep · 41 km away
  17. 1.710 km NW of Cobb, California · 13163 days ago · 0 km deep · 47 km away
  18. 1.88 km W of Cobb, California · 13162 days ago · -1 km deep · 45 km away
  19. 3.37 km WSW of Cobb, California · 13162 days ago · 0 km deep · 43 km away
  20. 1.97 km WSW of Cobb, California · 13162 days ago · 1 km deep · 43 km away
  21. 1.67 km WSW of Cobb, California · 13162 days ago · 0 km deep · 42 km away
  22. 1.87 km WSW of Cobb, California · 13161 days ago · 1 km deep · 42 km away
  23. 2.97 km WSW of Cobb, California · 13161 days ago · 1 km deep · 43 km away
  24. 2.47 km W of Cobb, California · 13161 days ago · 0 km deep · 43 km away
  25. 1.99 km W of Cobb, California · 13160 days ago · 0 km deep · 46 km away
  26. 1.63 km W of Cobb, California · 13160 days ago · 1 km deep · 40 km away
  27. 2.13 km E of Berkeley, California · 13160 days ago · 9 km deep · 86 km away
  28. 1.9Northern California · 13160 days ago · 15 km deep · 79 km away
  29. 1.810 km W of Cobb, California · 13158 days ago · 0 km deep · 46 km away
  30. 1.87 km WSW of Cobb, California · 13158 days ago · 3 km deep · 43 km away
  31. 2.510 km W of Cobb, California · 13157 days ago · 0 km deep · 46 km away
  32. 2.39 km W of Cobb, California · 13157 days ago · 0 km deep · 46 km away
  33. 1.75 km WSW of Cobb, California · 13156 days ago · 0 km deep · 40 km away
  34. 2.26 km W of Cobb, California · 13156 days ago · 3 km deep · 43 km away
  35. 1.93 km SSE of Calpella, California · 13156 days ago · 0 km deep · 95 km away
  36. 2.37 km SW of Cobb, California · 13156 days ago · 0 km deep · 39 km away
  37. 1.77 km WSW of Cobb, California · 13155 days ago · 2 km deep · 42 km away
  38. 1.69 km WNW of Cobb, California · 13154 days ago · 2 km deep · 46 km away
  39. 1.92 km SE of Pittsburg, California · 13154 days ago · 20 km deep · 82 km away
  40. 2.84 km S of Cobb, California · 13153 days ago · 1 km deep · 35 km away
  41. 2.25 km WSW of Cobb, California · 13153 days ago · 3 km deep · 40 km away
  42. 1.7near the coast of Northern California · 13153 days ago · 1 km deep · 75 km away
  43. 1.68 km W of Cobb, California · 13153 days ago · 3 km deep · 44 km away
  44. 2.27 km S of Cobb, California · 13152 days ago · 1 km deep · 33 km away
  45. 2.76 km WNW of Cobb, California · 13152 days ago · -1 km deep · 43 km away
  46. 1.69 km W of Cobb, California · 13152 days ago · -1 km deep · 45 km away
  47. 1.75 km SSW of Cobb, California · 13152 days ago · 0 km deep · 37 km away
  48. 1.65 km WSW of Cobb, California · 13151 days ago · 1 km deep · 41 km away
  49. 1.510 km W of Cobb, California · 13151 days ago · 0 km deep · 46 km away
  50. 1.55 km WNW of Cobb, California · 13150 days ago · 0 km deep · 43 km away
  51. 1.62 km ENE of Alamo, California · 13150 days ago · 5 km deep · 92 km away
  52. 1.94 km WSW of Cobb, California · 13150 days ago · 0 km deep · 40 km away
  53. 2.51 km NE of Alamo, California · 13150 days ago · 5 km deep · 92 km away
  54. 1.94 km SW of Cobb, California · 13149 days ago · 0 km deep · 38 km away
  55. 2.06 km S of Cobb, California · 13148 days ago · 1 km deep · 34 km away
  56. 1.66 km W of Cobb, California · 13147 days ago · -1 km deep · 43 km away
  57. 2.29 km W of Cobb, California · 13147 days ago · 0 km deep · 46 km away
  58. 1.79 km W of Cobb, California · 13147 days ago · 0 km deep · 46 km away
  59. 2.25 km WSW of Cobb, California · 13146 days ago · -1 km deep · 40 km away
  60. 1.66 km SW of Cobb, California · 13146 days ago · 0 km deep · 38 km away

The first 60 of 156.

Before

  1. 1.66 km SSW of Cobb, California · 13172 days ago · -1 km deep · 36 km away
  2. 1.65 km WSW of Cobb, California · 13172 days ago · 3 km deep · 41 km away
  3. 3.35 km WSW of Cobb, California · 13173 days ago · 0 km deep · 41 km away
  4. 1.83 km NNW of Diablo, California · 13173 days ago · 0 km deep · 92 km away
  5. 2.47 km S of Cobb, California · 13173 days ago · 1 km deep · 33 km away
  6. 1.95 km WSW of Cobb, California · 13173 days ago · 0 km deep · 41 km away
  7. 2.37 km WSW of Cobb, California · 13173 days ago · 2 km deep · 42 km away
  8. 1.617 km NE of Potter Valley, California · 13174 days ago · 1 km deep · 100 km away
  9. 2.29 km W of Cobb, California · 13174 days ago · 0 km deep · 46 km away
  10. 1.513 km NNW of Moskowite Corner, California · 13175 days ago · 5 km deep · 13 km away
  11. 1.95 km W of Cobb, California · 13177 days ago · 2 km deep · 42 km away
  12. 2.85 km WSW of Cobb, California · 13177 days ago · 0 km deep · 41 km away
  13. 1.62 km SW of Bay Point, California · 13177 days ago · 7 km deep · 77 km away
  14. 1.59 km W of Cobb, California · 13177 days ago · 0 km deep · 46 km away
  15. 2.022 km ENE of Potter Valley, California · 13178 days ago · 6 km deep · 92 km away
  16. 1.73 km SSE of Clear Lake Riviera, California · 13178 days ago · -1 km deep · 43 km away
  17. 1.93 km SSW of Cobb, California · 13178 days ago · 2 km deep · 37 km away
  18. 1.86 km W of Cobb, California · 13178 days ago · 3 km deep · 43 km away
  19. 2.66 km W of Cobb, California · 13180 days ago · 2 km deep · 43 km away
  20. 2.55 km WSW of Cobb, California · 13180 days ago · 1 km deep · 40 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc163997. Read Sun, Oct 4, 2026, 4:50 AM UTC.