California earthquakes

M1.7 earthquake 3 km NNW of Pacifica, California

A magnitude 1.7 earthquake struck 3 km NNW of Pacifica, California on Tue, May 1, 1984, 3:08 PM PDT (22:08 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.2 15 km NNE of Morgan Hill, 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
1.7 (md), micro
Local time
UTC
1984-05-01 22:08:57 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
37.641° N, 122.494° 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, 0.5 km in depth
Magnitude uncertainty
±0.01
Depth from
From location
Station coverage gap
175°
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: 184 in the 60 days after this one and 174 in the 30 days before it.

After

  1. 3.111 km NNE of Morgan Hill, California · 15491 days ago · 5 km deep · 90 km away
  2. 1.914 km NE of East Foothills, California · 15491 days ago · 2 km deep · 73 km away
  3. 3.016 km N of Morgan Hill, California · 15491 days ago · 8 km deep · 85 km away
  4. 1.89 km N of Morgan Hill, California · 15491 days ago · 6 km deep · 87 km away
  5. 2.115 km E of Seven Trees, California · 15491 days ago · 6 km deep · 84 km away
  6. 1.613 km ESE of East Foothills, California · 15491 days ago · 2 km deep · 80 km away
  7. 1.815 km E of Seven Trees, California · 15491 days ago · 5 km deep · 83 km away
  8. 1.68 km ENE of Morgan Hill, California · 15491 days ago · 3 km deep · 97 km away
  9. 1.814 km E of Seven Trees, California · 15491 days ago · 3 km deep · 82 km away
  10. 1.617 km N of Morgan Hill, California · 15491 days ago · 3 km deep · 87 km away
  11. 1.914 km N of Morgan Hill, California · 15490 days ago · 4 km deep · 86 km away
  12. 2.212 km N of Morgan Hill, California · 15490 days ago · 7 km deep · 87 km away
  13. 1.65 km E of Fremont, California · 15490 days ago · 9 km deep · 51 km away
  14. 1.815 km E of Seven Trees, California · 15490 days ago · 3 km deep · 83 km away
  15. 2.614 km N of Morgan Hill, California · 15490 days ago · 6 km deep · 86 km away
  16. 2.114 km E of Seven Trees, California · 15490 days ago · 6 km deep · 81 km away
  17. 2.113 km N of Morgan Hill, California · 15490 days ago · 4 km deep · 87 km away
  18. 3.216 km N of Morgan Hill, California · 15490 days ago · 8 km deep · 85 km away
  19. 4.216 km N of Morgan Hill, California · 15490 days ago · 9 km deep · 85 km away
  20. 2.212 km ESE of East Foothills, California · 15490 days ago · 6 km deep · 79 km away
  21. 1.69 km ENE of Morgan Hill, California · 15489 days ago · 5 km deep · 99 km away
  22. 3.02 km ENE of San Leandro, California · 15489 days ago · 4 km deep · 34 km away
  23. 2.4Northern California · 15489 days ago · 4 km deep · 97 km away
  24. 2.016 km E of Seven Trees, California · 15489 days ago · 4 km deep · 84 km away
  25. 1.516 km E of Seven Trees, California · 15489 days ago · 5 km deep · 84 km away
  26. 1.916 km E of Seven Trees, California · 15489 days ago · 8 km deep · 84 km away
  27. 1.73 km NNE of Pleasanton, California · 15489 days ago · 21 km deep · 56 km away
  28. 1.616 km E of Seven Trees, California · 15488 days ago · 8 km deep · 84 km away
  29. 3.415 km E of Seven Trees, California · 15488 days ago · 5 km deep · 83 km away
  30. 1.910 km NE of San Martin, California · 15488 days ago · 7 km deep · 99 km away
  31. 1.714 km N of Morgan Hill, California · 15488 days ago · 6 km deep · 86 km away
  32. 2.515 km E of Seven Trees, California · 15488 days ago · 5 km deep · 83 km away
  33. 2.1Northern California · 15488 days ago · 1 km deep · 82 km away
  34. 2.019 km ESE of East Foothills, California · 15488 days ago · 2 km deep · 85 km away
  35. 1.98 km ENE of Morgan Hill, California · 15488 days ago · 2 km deep · 99 km away
  36. 2.115 km N of Morgan Hill, California · 15488 days ago · 5 km deep · 85 km away
  37. 2.01 km NE of Pittsburg, California · 15488 days ago · 18 km deep · 70 km away
  38. 2.114 km E of Seven Trees, California · 15488 days ago · 5 km deep · 82 km away
  39. 1.77 km NNE of San Martin, California · 15487 days ago · 3 km deep · 98 km away
  40. 2.011 km ESE of East Foothills, California · 15487 days ago · 4 km deep · 77 km away
  41. 1.67 km NNE of San Martin, California · 15487 days ago · 4 km deep · 99 km away
  42. 2.813 km ESE of Alum Rock, California · 15487 days ago · 6 km deep · 80 km away
  43. 1.614 km E of Seven Trees, California · 15487 days ago · 9 km deep · 81 km away
  44. 1.714 km E of Seven Trees, California · 15487 days ago · 6 km deep · 81 km away
  45. 1.79 km NNE of Morgan Hill, California · 15486 days ago · 4 km deep · 92 km away
  46. 1.614 km E of Seven Trees, California · 15486 days ago · 4 km deep · 83 km away
  47. 1.624 km ENE of East Foothills, California · 15486 days ago · 0 km deep · 85 km away
  48. 1.67 km ENE of Morgan Hill, California · 15486 days ago · 3 km deep · 98 km away
  49. 3.115 km E of Seven Trees, California · 15486 days ago · 6 km deep · 83 km away
  50. 1.916 km NNE of Morgan Hill, California · 15485 days ago · 1 km deep · 90 km away
  51. 2.75 km WSW of Vacaville, California · 15485 days ago · 32 km deep · 86 km away
  52. 1.916 km E of Seven Trees, California · 15485 days ago · 8 km deep · 84 km away
  53. 2.38 km ENE of Morgan Hill, California · 15485 days ago · 3 km deep · 98 km away
  54. 2.115 km N of Morgan Hill, California · 15485 days ago · 1 km deep · 85 km away
  55. 1.513 km N of Morgan Hill, California · 15485 days ago · 7 km deep · 85 km away
  56. 1.69 km SSE of Sunol, California · 15484 days ago · 5 km deep · 59 km away
  57. 1.60 km NE of Larkfield-Wikiup, California · 15484 days ago · 3 km deep · 100 km away
  58. 1.715 km N of Morgan Hill, California · 15484 days ago · 5 km deep · 85 km away
  59. 1.79 km ENE of Seven Trees, California · 15484 days ago · 2 km deep · 76 km away
  60. 2.15 km N of Morgan Hill, California · 15484 days ago · 5 km deep · 90 km away

The first 60 of 184.

Before

  1. 1.711 km ESE of East Foothills, California · 15491 days ago · 7 km deep · 78 km away
  2. 1.512 km N of Morgan Hill, California · 15491 days ago · 7 km deep · 87 km away
  3. 1.78 km ENE of Morgan Hill, California · 15492 days ago · 4 km deep · 98 km away
  4. 3.216 km N of Morgan Hill, California · 15492 days ago · 3 km deep · 87 km away
  5. 2.015 km E of Seven Trees, California · 15492 days ago · 5 km deep · 84 km away
  6. 1.515 km N of Morgan Hill, California · 15492 days ago · 5 km deep · 85 km away
  7. 2.814 km N of Morgan Hill, California · 15492 days ago · 6 km deep · 87 km away
  8. 2.714 km N of Morgan Hill, California · 15492 days ago · 6 km deep · 86 km away
  9. 1.715 km E of Seven Trees, California · 15493 days ago · 6 km deep · 83 km away
  10. 1.75 km ENE of Morgan Hill, California · 15493 days ago · 2 km deep · 96 km away
  11. 1.716 km N of Morgan Hill, California · 15493 days ago · 3 km deep · 86 km away
  12. 2.216 km E of Seven Trees, California · 15493 days ago · 8 km deep · 84 km away
  13. 1.814 km ENE of East Foothills, California · 15493 days ago · 5 km deep · 78 km away
  14. 3.08 km NNE of San Martin, California · 15493 days ago · 2 km deep · 99 km away
  15. 1.614 km ESE of East Foothills, California · 15493 days ago · 1 km deep · 81 km away
  16. 1.917 km N of Morgan Hill, California · 15493 days ago · 2 km deep · 86 km away
  17. 2.1Northern California · 15494 days ago · 2 km deep · 96 km away
  18. 1.612 km NNE of Morgan Hill, California · 15494 days ago · 6 km deep · 89 km away
  19. 1.77 km NNE of Morgan Hill, California · 15494 days ago · 3 km deep · 92 km away
  20. 1.812 km N of Morgan Hill, California · 15494 days ago · 6 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1114704. Read Wed, Sep 30, 2026, 4:52 AM UTC.