California earthquakes

M1.6 earthquake 3 km WNW of Pacifica, California

A magnitude 1.6 earthquake struck 3 km WNW of Pacifica, California on Sun, May 6, 1990, 9:18 AM PDT (16:18 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.1 6 km NE of East Foothills, California. This one was a foreshock.

Pacifica 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-05-06 16:18:36 UTC
Depth
7.1 km (4.4 mi), shallow
Epicenter
37.627° N, 122.527° 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 0.9 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
219°, poorly surrounded by stations
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: 112 in the 60 days after this one and 193 in the 30 days before it.

After

  1. 1.90 km ENE of Alamo, California · 13298 days ago · 5 km deep · 51 km away
  2. 1.98 km N of Day Valley, California · 13298 days ago · 4 km deep · 83 km away
  3. 2.44 km SE of North Gate, California · 13298 days ago · 5 km deep · 56 km away
  4. 2.11 km NW of Pleasant Hill, California · 13297 days ago · 10 km deep · 54 km away
  5. 1.61 km ENE of Alamo, California · 13297 days ago · 4 km deep · 51 km away
  6. 2.88 km NNE of Day Valley, California · 13297 days ago · 4 km deep · 85 km away
  7. 1.63 km NW of Diablo, California · 13297 days ago · 7 km deep · 54 km away
  8. 1.72 km ESE of Danville, California · 13296 days ago · 7 km deep · 53 km away
  9. 1.62 km ESE of Danville, California · 13296 days ago · 6 km deep · 53 km away
  10. 1.615 km N of Morgan Hill, California · 13296 days ago · 6 km deep · 87 km away
  11. 1.72 km ENE of Alamo, California · 13295 days ago · 3 km deep · 53 km away
  12. 1.66 km WNW of Day Valley, California · 13295 days ago · 16 km deep · 82 km away
  13. 3.415 km E of Seven Trees, California · 13295 days ago · 6 km deep · 85 km away
  14. 1.92 km NNE of Piedmont, California · 13295 days ago · 11 km deep · 36 km away
  15. 1.84 km ESE of Roseland, California · 13294 days ago · 7 km deep · 88 km away
  16. 1.615 km N of Morgan Hill, California · 13294 days ago · 5 km deep · 87 km away
  17. 2.42 km NE of Alamo, California · 13294 days ago · 5 km deep · 53 km away
  18. 2.52 km ENE of Alamo, California · 13294 days ago · 3 km deep · 53 km away
  19. 1.54 km SSE of Lexington Hills, California · 13294 days ago · 11 km deep · 76 km away
  20. 1.54 km ESE of Roseland, California · 13293 days ago · 7 km deep · 88 km away
  21. 1.72 km ESE of Danville, California · 13292 days ago · 6 km deep · 53 km away
  22. 2.13 km E of Alamo, California · 13292 days ago · 2 km deep · 54 km away
  23. 1.716 km W of Bolinas, California · 13291 days ago · 9 km deep · 44 km away
  24. 2.93 km WNW of Pacifica, California · 13291 days ago · 7 km deep · 0 km away
  25. 1.61 km NW of Pacifica, California · 13290 days ago · 6 km deep · 3 km away
  26. 2.70 km E of Alamo, California · 13289 days ago · 6 km deep · 50 km away
  27. 1.8Northern California · 13289 days ago · 2 km deep · 54 km away
  28. 1.715 km E of Seven Trees, California · 13289 days ago · 5 km deep · 85 km away
  29. 1.51 km NE of Danville, California · 13289 days ago · 6 km deep · 53 km away
  30. 1.81 km ENE of Alamo, California · 13289 days ago · 3 km deep · 52 km away
  31. 3.67 km E of East Foothills, California · 13288 days ago · 8 km deep · 76 km away
  32. 1.8Northern California · 13287 days ago · 6 km deep · 44 km away
  33. 1.60 km ENE of Alamo, California · 13287 days ago · 4 km deep · 51 km away
  34. 2.02 km N of Lexington Hills, California · 13287 days ago · 5 km deep · 70 km away
  35. 1.92 km ENE of Alamo, California · 13286 days ago · 6 km deep · 52 km away
  36. 2.29 km NNW of Boulder Creek, California · 13285 days ago · 4 km deep · 57 km away
  37. 2.33 km W of Antioch, California · 13285 days ago · 17 km deep · 73 km away
  38. 1.71 km W of Loyola, California · 13284 days ago · 3 km deep · 47 km away
  39. 2.02 km ENE of Alamo, California · 13284 days ago · 1 km deep · 52 km away
  40. 1.62 km SSW of Lexington Hills, California · 13283 days ago · 11 km deep · 72 km away
  41. 1.61 km NNW of Pleasanton, California · 13282 days ago · 10 km deep · 57 km away
  42. 2.37 km S of Sunol, California · 13280 days ago · 10 km deep · 57 km away
  43. 1.85 km SSW of Davenport, California · 13280 days ago · 3 km deep · 78 km away
  44. 1.83 km ENE of Alamo, California · 13279 days ago · 4 km deep · 53 km away
  45. 1.74 km ESE of Alameda, California · 13279 days ago · 5 km deep · 32 km away
  46. 1.90 km W of Crockett, California · 13279 days ago · 10 km deep · 54 km away
  47. 1.64 km S of Lexington Hills, California · 13278 days ago · 13 km deep · 74 km away
  48. 2.21 km SSE of Danville, California · 13278 days ago · 9 km deep · 51 km away
  49. 1.62 km E of Alamo, California · 13277 days ago · 3 km deep · 52 km away
  50. 1.72 km NNE of Danville, California · 13277 days ago · 5 km deep · 53 km away
  51. 2.70 km W of Diablo, California · 13277 days ago · 15 km deep · 54 km away
  52. 2.213 km WNW of Davenport, California · 13277 days ago · 3 km deep · 65 km away
  53. 2.02 km E of Alamo, California · 13277 days ago · 4 km deep · 52 km away
  54. 2.14 km WNW of Lexington Hills, California · 13277 days ago · 11 km deep · 67 km away
  55. 2.44 km S of Lexington Hills, California · 13276 days ago · 14 km deep · 74 km away
  56. 1.82 km S of Lexington Hills, California · 13276 days ago · 13 km deep · 73 km away
  57. 1.612 km WSW of Byron, California · 13276 days ago · 12 km deep · 70 km away
  58. 2.22 km NNW of Seacliff, California · 13276 days ago · 5 km deep · 88 km away
  59. 2.89 km ESE of Livermore, California · 13275 days ago · 9 km deep · 75 km away
  60. 2.44 km NNW of Diablo, California · 13275 days ago · 3 km deep · 55 km away

The first 60 of 112.

Before

  1. 1.71 km E of Alamo, California · 13299 days ago · 6 km deep · 52 km away
  2. 2.21 km E of Alamo, California · 13299 days ago · 7 km deep · 52 km away
  3. 1.61 km NNE of Danville, California · 13299 days ago · 7 km deep · 52 km away
  4. 2.31 km E of Alamo, California · 13299 days ago · 7 km deep · 52 km away
  5. 2.31 km E of Alamo, California · 13299 days ago · 7 km deep · 52 km away
  6. 2.02 km N of Lexington Hills, California · 13299 days ago · 5 km deep · 70 km away
  7. 1.51 km NE of Danville, California · 13299 days ago · 5 km deep · 53 km away
  8. 1.70 km ENE of Alamo, California · 13299 days ago · 5 km deep · 51 km away
  9. 1.81 km NE of Danville, California · 13299 days ago · 5 km deep · 53 km away
  10. 1.81 km ENE of Alamo, California · 13300 days ago · 5 km deep · 52 km away
  11. 3.12 km ENE of Alamo, California · 13300 days ago · 8 km deep · 52 km away
  12. 1.61 km ENE of Alamo, California · 13300 days ago · 6 km deep · 51 km away
  13. 2.01 km ENE of Alamo, California · 13300 days ago · 6 km deep · 52 km away
  14. 2.81 km ENE of Alamo, California · 13300 days ago · 7 km deep · 52 km away
  15. 2.22 km SSW of Fulton, California · 13300 days ago · 4 km deep · 97 km away
  16. 2.014 km ENE of East Foothills, California · 13300 days ago · 5 km deep · 80 km away
  17. 1.51 km NE of Danville, California · 13300 days ago · 6 km deep · 53 km away
  18. 1.51 km NE of Danville, California · 13300 days ago · 6 km deep · 53 km away
  19. 3.02 km NNE of Danville, California · 13300 days ago · 8 km deep · 53 km away
  20. 1.61 km NE of Danville, California · 13300 days ago · 6 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc157172. Read Sat, Oct 3, 2026, 2:02 PM UTC.