California earthquakes

M1.5 earthquake 2 km NW of Concord, California

A magnitude 1.5 earthquake struck 2 km NW of Concord, California on Sun, Apr 22, 1990, 10:41 AM PDT (17:41 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M4.4 3 km SSE of North Gate, California. This one was a foreshock.

Concord 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
1.5 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-04-22 17:41:19 UTC
Depth
16.5 km (10.2 mi), shallow
Epicenter
37.993° N, 122.047° 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, 0.9 km in depth
Magnitude uncertainty
±0.01
Depth from
From location
Station coverage gap
89°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 187 in the 60 days after this one and 192 in the 30 days before it.

After

  1. 2.03 km NW of Diablo, California · 13311 days ago · 5 km deep · 15 km away
  2. 2.314 km E of Seven Trees, California · 13311 days ago · 2 km deep · 84 km away
  3. 1.714 km E of Seven Trees, California · 13311 days ago · 3 km deep · 84 km away
  4. 2.617 km NW of Diablo Grande, California · 13311 days ago · 3 km deep · 77 km away
  5. 2.817 km NW of Diablo Grande, California · 13311 days ago · 3 km deep · 77 km away
  6. 1.71 km WNW of Diablo, California · 13311 days ago · 8 km deep · 18 km away
  7. 2.014 km SE of Hidden Valley Lake, California · 13310 days ago · 7 km deep · 88 km away
  8. 2.14 km NNW of Diablo, California · 13310 days ago · 5 km deep · 15 km away
  9. 1.64 km ENE of Alamo, CA · 13310 days ago · 4 km deep · 15 km away
  10. 2.02 km SSW of Los Altos Hills, California · 13309 days ago · 5 km deep · 71 km away
  11. 3.13 km ENE of Alamo, California · 13309 days ago · 7 km deep · 15 km away
  12. 1.63 km ENE of Alamo, California · 13309 days ago · 4 km deep · 15 km away
  13. 1.83 km ENE of Alamo, California · 13309 days ago · 6 km deep · 15 km away
  14. 2.22 km E of Alamo, California · 13309 days ago · 6 km deep · 16 km away
  15. 1.92 km ENE of Alamo, California · 13309 days ago · 3 km deep · 15 km away
  16. 1.82 km ENE of Alamo, California · 13309 days ago · 5 km deep · 15 km away
  17. 1.84 km NNW of Diablo, California · 13309 days ago · 6 km deep · 15 km away
  18. 1.66 km SW of Kenwood, California · 13308 days ago · 6 km deep · 65 km away
  19. 2.53 km SSE of North Gate, California · 13308 days ago · 5 km deep · 15 km away
  20. 1.63 km NNW of Diablo, California · 13308 days ago · 5 km deep · 15 km away
  21. 2.34 km SSE of North Gate, California · 13307 days ago · 7 km deep · 15 km away
  22. 2.94 km NNW of Diablo, California · 13307 days ago · 6 km deep · 15 km away
  23. 4.43 km SSE of North Gate, California · 13307 days ago · 7 km deep · 14 km away
  24. 2.92 km SSE of North Gate, California · 13307 days ago · 7 km deep · 13 km away
  25. 2.73 km ENE of Alamo, California · 13307 days ago · 6 km deep · 15 km away
  26. 2.42 km ENE of Alamo, California · 13307 days ago · 6 km deep · 15 km away
  27. 4.24 km SSE of North Gate, California · 13307 days ago · 8 km deep · 15 km away
  28. 3.04 km SE of North Gate, California · 13307 days ago · 6 km deep · 15 km away
  29. 2.31 km W of Alamo, California · 13307 days ago · 6 km deep · 16 km away
  30. 2.10 km ENE of Alamo, California · 13307 days ago · 6 km deep · 16 km away
  31. 1.74 km N of Diablo, California · 13307 days ago · 6 km deep · 15 km away
  32. 1.71 km E of Alamo, California · 13307 days ago · 5 km deep · 16 km away
  33. 2.42 km ENE of Alamo, California · 13307 days ago · 7 km deep · 15 km away
  34. 2.74 km NW of Diablo, California · 13307 days ago · 6 km deep · 15 km away
  35. 2.23 km NNW of Diablo, California · 13307 days ago · 6 km deep · 15 km away
  36. 2.11 km NE of Alamo, California · 13307 days ago · 4 km deep · 15 km away
  37. 1.83 km NW of Diablo, California · 13307 days ago · 3 km deep · 16 km away
  38. 2.28 km N of Bay Point, California · 13307 days ago · 9 km deep · 14 km away
  39. 1.61 km ENE of Alamo, California · 13307 days ago · 6 km deep · 16 km away
  40. 1.91 km ENE of Alamo, California · 13307 days ago · 6 km deep · 16 km away
  41. 1.91 km ENE of Alamo, California · 13307 days ago · 6 km deep · 15 km away
  42. 1.72 km ENE of Alamo, California · 13307 days ago · 6 km deep · 15 km away
  43. 1.62 km NE of Alamo, California · 13307 days ago · 7 km deep · 15 km away
  44. 3.41 km NE of Alamo, California · 13307 days ago · 8 km deep · 15 km away
  45. 1.61 km ENE of Alamo, California · 13307 days ago · 6 km deep · 16 km away
  46. 2.81 km ENE of Alamo, California · 13307 days ago · 7 km deep · 15 km away
  47. 1.82 km ENE of Alamo, California · 13307 days ago · 4 km deep · 16 km away
  48. 1.92 km ENE of Alamo, California · 13307 days ago · 4 km deep · 16 km away
  49. 2.40 km E of Alamo, California · 13307 days ago · 6 km deep · 16 km away
  50. 1.71 km ENE of Alamo, California · 13307 days ago · 5 km deep · 15 km away
  51. 1.93 km ENE of Alamo, California · 13307 days ago · 6 km deep · 16 km away
  52. 1.63 km ENE of Alamo, California · 13307 days ago · 3 km deep · 16 km away
  53. 1.51 km ENE of Alamo, California · 13307 days ago · 6 km deep · 16 km away
  54. 1.94 km NNW of Diablo, California · 13307 days ago · 5 km deep · 15 km away
  55. 1.71 km E of Alamo, California · 13307 days ago · 5 km deep · 16 km away
  56. 2.63 km SSE of North Gate, California · 13307 days ago · 6 km deep · 14 km away
  57. 2.04 km NNW of Diablo, California · 13307 days ago · 5 km deep · 15 km away
  58. 1.91 km E of Alamo, California · 13307 days ago · 5 km deep · 16 km away
  59. 2.41 km ENE of Alamo, California · 13307 days ago · 7 km deep · 16 km away
  60. 1.63 km ENE of Alamo, California · 13307 days ago · 3 km deep · 15 km away

The first 60 of 187.

Before

  1. 1.513 km ESE of Hidden Valley Lake, California · 13313 days ago · 8 km deep · 91 km away
  2. 1.86 km E of Santa Rosa, California · 13314 days ago · 8 km deep · 71 km away
  3. 2.08 km N of Morgan Hill, California · 13314 days ago · 7 km deep · 95 km away
  4. 2.114 km NNW of Moskowite Corner, California · 13314 days ago · 2 km deep · 66 km away
  5. 1.77 km NNW of Green Valley, California · 13314 days ago · 9 km deep · 38 km away
  6. 2.22 km ENE of Alamo, California · 13314 days ago · 5 km deep · 15 km away
  7. 1.86 km NNW of Green Valley, California · 13315 days ago · 8 km deep · 37 km away
  8. 1.92 km NE of Alamo, California · 13315 days ago · 5 km deep · 15 km away
  9. 1.92 km NE of Alamo, California · 13315 days ago · 5 km deep · 15 km away
  10. 1.8Northern California · 13316 days ago · 5 km deep · 16 km away
  11. 2.23 km ENE of Alamo, California · 13316 days ago · 6 km deep · 15 km away
  12. 1.64 km NNW of Diablo, California · 13317 days ago · 5 km deep · 15 km away
  13. 1.78 km SSE of Pescadero, California · 13317 days ago · 13 km deep · 93 km away
  14. 2.84 km NNW of Diablo, California · 13317 days ago · 6 km deep · 15 km away
  15. 2.59 km N of Pittsburg, California · 13317 days ago · 21 km deep · 21 km away
  16. 1.91 km NE of Alamo, California · 13318 days ago · 6 km deep · 15 km away
  17. 2.34 km NNW of Diablo, California · 13318 days ago · 3 km deep · 15 km away
  18. 1.64 km NW of Diablo, California · 13318 days ago · 6 km deep · 15 km away
  19. 2.14 km NNW of Diablo, California · 13318 days ago · 5 km deep · 15 km away
  20. 2.34 km W of Alamo, California · 13318 days ago · 6 km deep · 16 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc156442. Read Sat, Oct 3, 2026, 1:28 PM UTC.