California earthquakes

M2.8 earthquake 1 km ENE of Alamo, California

A magnitude 2.8 earthquake struck 1 km ENE of Alamo, California on Fri, Apr 27, 1990, 10:55 PM PDT (05:55 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.6 7 km E of East Foothills, California. This one was a foreshock.

Alamo 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
2.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-04-28 05:55:37 UTC
Depth
6.8 km (4.2 mi), shallow
Epicenter
37.856° N, 122.018° 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, 0.3 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
53°
Stations used
60

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 189 in the 60 days after this one and 193 in the 30 days before it.

After

  1. 1.82 km ENE of Alamo, California · 13308 days ago · 4 km deep · 1 km away
  2. 1.92 km ENE of Alamo, California · 13308 days ago · 4 km deep · 1 km away
  3. 2.40 km E of Alamo, California · 13308 days ago · 6 km deep · 1 km away
  4. 1.71 km ENE of Alamo, California · 13308 days ago · 5 km deep · 0 km away
  5. 1.93 km ENE of Alamo, California · 13308 days ago · 6 km deep · 2 km away
  6. 1.63 km ENE of Alamo, California · 13308 days ago · 3 km deep · 2 km away
  7. 1.51 km ENE of Alamo, California · 13308 days ago · 6 km deep · 1 km away
  8. 1.94 km NNW of Diablo, California · 13308 days ago · 5 km deep · 3 km away
  9. 1.71 km E of Alamo, California · 13308 days ago · 5 km deep · 1 km away
  10. 2.63 km SSE of North Gate, California · 13308 days ago · 6 km deep · 4 km away
  11. 2.04 km NNW of Diablo, California · 13308 days ago · 5 km deep · 4 km away
  12. 1.91 km E of Alamo, California · 13308 days ago · 5 km deep · 1 km away
  13. 2.41 km ENE of Alamo, California · 13308 days ago · 7 km deep · 0 km away
  14. 1.63 km ENE of Alamo, California · 13308 days ago · 3 km deep · 2 km away
  15. 1.71 km ENE of Alamo, California · 13308 days ago · 6 km deep · 0 km away
  16. 1.71 km ENE of Alamo, California · 13308 days ago · 6 km deep · 1 km away
  17. 2.43 km ENE of Alamo, California · 13308 days ago · 6 km deep · 2 km away
  18. 1.61 km NE of Alamo, California · 13308 days ago · 5 km deep · 0 km away
  19. 2.72 km ENE of Alamo, California · 13308 days ago · 5 km deep · 1 km away
  20. 2.45 km N of Interlaken, California · 13308 days ago · 9 km deep · 98 km away
  21. 1.61 km ENE of Alamo, California · 13308 days ago · 5 km deep · 0 km away
  22. 1.71 km ENE of Alamo, California · 13308 days ago · 6 km deep · 1 km away
  23. 2.83 km ENE of Alamo, California · 13308 days ago · 5 km deep · 2 km away
  24. 1.93 km ENE of Alamo, California · 13308 days ago · 5 km deep · 2 km away
  25. 1.83 km NNW of Diablo, California · 13308 days ago · 1 km deep · 4 km away
  26. 1.84 km SSE of North Gate, California · 13308 days ago · 7 km deep · 3 km away
  27. 1.71 km ENE of Alamo, California · 13308 days ago · 5 km deep · 1 km away
  28. 1.61 km ENE of Alamo, California · 13308 days ago · 6 km deep · 0 km away
  29. 1.51 km ENE of Alamo, California · 13308 days ago · 5 km deep · 0 km away
  30. 1.73 km ENE of Alamo, California · 13308 days ago · 3 km deep · 2 km away
  31. 2.51 km NE of Alamo, California · 13308 days ago · 7 km deep · 0 km away
  32. 1.56 km N of Interlaken, California · 13308 days ago · 8 km deep · 98 km away
  33. 1.81 km ENE of Alamo, California · 13308 days ago · 6 km deep · 0 km away
  34. 2.51 km ENE of Alamo, California · 13308 days ago · 5 km deep · 0 km away
  35. 1.60 km NE of Alamo, California · 13308 days ago · 5 km deep · 1 km away
  36. 2.00 km ENE of Alamo, California · 13308 days ago · 5 km deep · 0 km away
  37. 2.51 km NE of Alamo, California · 13308 days ago · 5 km deep · 1 km away
  38. 2.92 km ENE of Alamo, California · 13308 days ago · 6 km deep · 1 km away
  39. 2.52 km ENE of Alamo, California · 13308 days ago · 6 km deep · 1 km away
  40. 1.51 km ENE of Alamo, California · 13308 days ago · 6 km deep · 0 km away
  41. 1.93 km ENE of Alamo, California · 13307 days ago · 5 km deep · 2 km away
  42. 2.01 km ENE of Alamo, California · 13307 days ago · 6 km deep · 0 km away
  43. 2.43 km ENE of Alamo, California · 13307 days ago · 5 km deep · 2 km away
  44. 2.03 km NNW of Diablo, California · 13307 days ago · 6 km deep · 4 km away
  45. 1.70 km NE of Alamo, California · 13307 days ago · 5 km deep · 1 km away
  46. 2.10 km ENE of Alamo, California · 13307 days ago · 5 km deep · 1 km away
  47. 1.61 km ENE of Alamo, California · 13307 days ago · 2 km deep · 1 km away
  48. 1.91 km ENE of Alamo, California · 13307 days ago · 6 km deep · 1 km away
  49. 1.81 km ENE of Alamo, California · 13307 days ago · 6 km deep · 0 km away
  50. 2.23 km ENE of Alamo, California · 13307 days ago · 6 km deep · 2 km away
  51. 2.12 km WNW of Diablo, California · 13307 days ago · 7 km deep · 3 km away
  52. 1.95 km S of Moskowite Corner, California · 13307 days ago · 6 km deep · 61 km away
  53. 1.51 km ENE of Alamo, California · 13307 days ago · 6 km deep · 0 km away
  54. 1.72 km ENE of Alamo, California · 13307 days ago · 5 km deep · 1 km away
  55. 1.83 km NNW of Diablo, California · 13307 days ago · 1 km deep · 4 km away
  56. 2.52 km ENE of Alamo, California · 13307 days ago · 8 km deep · 1 km away
  57. 1.64 km NNW of Diablo, California · 13307 days ago · 4 km deep · 4 km away
  58. 2.73 km ENE of Alamo, California · 13307 days ago · 6 km deep · 2 km away
  59. 1.71 km ENE of Alamo, California · 13307 days ago · 6 km deep · 0 km away
  60. 1.92 km ESE of Danville, California · 13306 days ago · 7 km deep · 6 km away

The first 60 of 189.

Before

  1. 1.61 km ENE of Alamo, California · 13308 days ago · 6 km deep · 0 km away
  2. 3.41 km NE of Alamo, California · 13308 days ago · 8 km deep · 0 km away
  3. 1.62 km NE of Alamo, California · 13308 days ago · 7 km deep · 1 km away
  4. 1.72 km ENE of Alamo, California · 13308 days ago · 6 km deep · 1 km away
  5. 1.91 km ENE of Alamo, California · 13308 days ago · 6 km deep · 0 km away
  6. 1.91 km ENE of Alamo, California · 13308 days ago · 6 km deep · 0 km away
  7. 1.61 km ENE of Alamo, California · 13308 days ago · 6 km deep · 0 km away
  8. 2.28 km N of Bay Point, California · 13308 days ago · 9 km deep · 28 km away
  9. 1.83 km NW of Diablo, California · 13308 days ago · 3 km deep · 3 km away
  10. 2.11 km NE of Alamo, California · 13308 days ago · 4 km deep · 1 km away
  11. 2.23 km NNW of Diablo, California · 13308 days ago · 6 km deep · 3 km away
  12. 2.74 km NW of Diablo, California · 13308 days ago · 6 km deep · 3 km away
  13. 2.42 km ENE of Alamo, California · 13308 days ago · 7 km deep · 1 km away
  14. 1.71 km E of Alamo, California · 13308 days ago · 5 km deep · 1 km away
  15. 1.74 km N of Diablo, California · 13308 days ago · 6 km deep · 5 km away
  16. 2.10 km ENE of Alamo, California · 13308 days ago · 6 km deep · 1 km away
  17. 2.31 km W of Alamo, California · 13308 days ago · 6 km deep · 2 km away
  18. 3.04 km SE of North Gate, California · 13308 days ago · 6 km deep · 5 km away
  19. 4.24 km SSE of North Gate, California · 13308 days ago · 8 km deep · 3 km away
  20. 2.42 km ENE of Alamo, California · 13308 days ago · 6 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc156713. Read Sun, Oct 4, 2026, 9:20 AM UTC.