California earthquakes

M1.6 earthquake 4 km NW of Dublin, California

A magnitude 1.6 earthquake struck 4 km NW of Dublin, California on Sat, Mar 21, 1981, 11:33 AM PST (19:33 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.1 15 km E of Seven Trees, 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
1.6 (md), micro
Local time
UTC
1981-03-21 19:33:58 UTC
Depth
6.7 km (4.1 mi), shallow
Epicenter
37.727° N, 121.979° 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 0.4 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.38
Depth from
From location
Station coverage gap
61°
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: 70 in the 60 days after this one and 91 in the 30 days before it.

After

  1. 2.115 km E of Seven Trees, California · 16620 days ago · 3 km deep · 56 km away
  2. 2.314 km E of Seven Trees, California · 16620 days ago · 4 km deep · 56 km away
  3. 2.37 km E of East Foothills, California · 16619 days ago · 8 km deep · 45 km away
  4. 2.23 km NNW of Castro Valley, California · 16618 days ago · 10 km deep · 10 km away
  5. 1.69 km NE of San Martin, California · 16618 days ago · 7 km deep · 75 km away
  6. 2.06 km ESE of Roseland, California · 16617 days ago · 8 km deep · 95 km away
  7. 3.114 km SSE of Livermore, California · 16617 days ago · 2 km deep · 31 km away
  8. 1.713 km N of Morgan Hill, California · 16617 days ago · 6 km deep · 60 km away
  9. 1.614 km SSE of Livermore, California · 16616 days ago · 2 km deep · 31 km away
  10. 1.89 km NNE of San Juan Bautista, California · 16616 days ago · 4 km deep · 98 km away
  11. 1.710 km E of San Martin, California · 16614 days ago · 9 km deep · 83 km away
  12. 1.515 km SSE of Livermore, California · 16614 days ago · 2 km deep · 32 km away
  13. 2.112 km NNW of Hollister, California · 16611 days ago · 4 km deep · 98 km away
  14. 1.68 km NE of San Martin, California · 16609 days ago · 6 km deep · 77 km away
  15. 1.96 km S of Sunol, California · 16609 days ago · 9 km deep · 23 km away
  16. 1.62 km NW of Bonny Doon, California · 16608 days ago · 12 km deep · 76 km away
  17. 1.616 km SSE of Livermore, California · 16606 days ago · -1 km deep · 33 km away
  18. 1.59 km NE of Gilroy, California · 16606 days ago · 8 km deep · 85 km away
  19. 1.74 km W of Westley, California · 16605 days ago · 8 km deep · 67 km away
  20. 1.58 km E of East Foothills, California · 16605 days ago · 8 km deep · 46 km away
  21. 1.53 km WSW of Campbell, California · 16605 days ago · 4 km deep · 50 km away
  22. 1.53 km NNE of Pleasanton, California · 16604 days ago · 14 km deep · 12 km away
  23. 1.912 km N of Livermore, California · 16604 days ago · 10 km deep · 21 km away
  24. 1.89 km NNW of Hollister, California · 16602 days ago · 0 km deep · 100 km away
  25. 1.74 km NE of Blackhawk, California · 16601 days ago · 5 km deep · 17 km away
  26. 3.410 km NNE of Livermore, California · 16600 days ago · 13 km deep · 23 km away
  27. 1.814 km E of Seven Trees, California · 16600 days ago · 1 km deep · 55 km away
  28. 1.60 km W of Moskowite Corner, California · 16598 days ago · 16 km deep · 82 km away
  29. 1.610 km E of Gilroy, California · 16597 days ago · 8 km deep · 93 km away
  30. 1.65 km ENE of San Martin, California · 16597 days ago · 3 km deep · 80 km away
  31. 1.822 km SE of Livermore, California · 16597 days ago · 2 km deep · 39 km away
  32. 1.713 km N of Hollister, California · 16594 days ago · 7 km deep · 99 km away
  33. 1.78 km ESE of Blackhawk, California · 16591 days ago · 7 km deep · 16 km away
  34. 1.94 km ESE of Interlaken, California · 16590 days ago · 10 km deep · 92 km away
  35. 1.97 km SE of Sunol, California · 16589 days ago · 5 km deep · 24 km away
  36. 1.72 km NW of Orinda, California · 16589 days ago · 11 km deep · 26 km away
  37. 1.82 km NNW of Brentwood, California · 16587 days ago · 0 km deep · 34 km away
  38. 1.68 km SSW of Antioch, California · 16587 days ago · 0 km deep · 26 km away
  39. 1.67 km NNE of East Foothills, California · 16586 days ago · 11 km deep · 37 km away
  40. 4.18 km N of Day Valley, California · 16586 days ago · 13 km deep · 69 km away
  41. 2.616 km N of Morgan Hill, California · 16584 days ago · 6 km deep · 58 km away
  42. 2.22 km ESE of Aromas, California · 16582 days ago · 7 km deep · 99 km away
  43. 1.77 km W of Mountain House, California · 16582 days ago · 9 km deep · 32 km away
  44. 1.69 km ESE of East Foothills, California · 16582 days ago · 8 km deep · 47 km away
  45. 2.29 km ESE of East Foothills, California · 16582 days ago · 8 km deep · 47 km away
  46. 1.78 km W of Gilroy, California · 16580 days ago · 7 km deep · 85 km away
  47. 2.03 km SW of Broadmoor, California · 16578 days ago · 7 km deep · 47 km away
  48. 1.66 km WSW of Pescadero, California · 16578 days ago · 6 km deep · 70 km away
  49. 1.58 km NE of Gilroy, California · 16577 days ago · 3 km deep · 86 km away
  50. 1.7Northern California · 16574 days ago · 9 km deep · 84 km away
  51. 2.714 km E of East Foothills, California · 16573 days ago · 6 km deep · 50 km away
  52. 1.89 km ENE of Gilroy, California · 16572 days ago · 8 km deep · 90 km away
  53. 2.420 km SW of Diablo Grande, California · 16571 days ago · 72 km deep · 66 km away
  54. 1.79 km E of Gilroy, California · 16571 days ago · 8 km deep · 91 km away
  55. 2.82 km ENE of San Leandro, California · 16570 days ago · 11 km deep · 13 km away
  56. 1.70 km NNW of Concord, California · 16570 days ago · 13 km deep · 29 km away
  57. 1.611 km ESE of East Foothills, California · 16569 days ago · 7 km deep · 50 km away
  58. 2.29 km ENE of Gilroy, California · 16567 days ago · 9 km deep · 89 km away
  59. 1.611 km E of Blackhawk, California · 16566 days ago · 11 km deep · 21 km away
  60. 1.63 km NNE of Union City, California · 16566 days ago · 7 km deep · 11 km away

The first 60 of 70.

Before

  1. 1.69 km NE of Gilroy, California · 16621 days ago · 9 km deep · 86 km away
  2. 2.85 km NNE of Interlaken, California · 16622 days ago · 12 km deep · 84 km away
  3. 1.611 km E of Blackhawk, California · 16623 days ago · 11 km deep · 21 km away
  4. 1.63 km NNE of Day Valley, California · 16623 days ago · 15 km deep · 75 km away
  5. 1.78 km ENE of Gilroy, California · 16623 days ago · 8 km deep · 89 km away
  6. 1.614 km E of Seven Trees, California · 16623 days ago · 1 km deep · 55 km away
  7. 2.314 km E of Seven Trees, California · 16625 days ago · 2 km deep · 55 km away
  8. 3.19 km SW of Brentwood, California · 16627 days ago · 16 km deep · 24 km away
  9. 1.73 km N of Piedmont, California · 16628 days ago · 11 km deep · 26 km away
  10. 1.69 km ESE of East Foothills, California · 16628 days ago · 8 km deep · 47 km away
  11. 2.17 km NNE of Milpitas, California · 16628 days ago · 0 km deep · 28 km away
  12. 1.68 km ENE of Gilroy, California · 16628 days ago · 7 km deep · 87 km away
  13. 1.75 km E of Fremont, California · 16628 days ago · 9 km deep · 20 km away
  14. 1.813 km N of Morgan Hill, California · 16628 days ago · 6 km deep · 61 km away
  15. 1.75 km E of Fremont, California · 16629 days ago · 5 km deep · 21 km away
  16. 2.13 km ESE of Aromas, California · 16631 days ago · 6 km deep · 100 km away
  17. 2.21 km ENE of Aromas, California · 16632 days ago · 7 km deep · 98 km away
  18. 1.60 km ENE of Aromas, California · 16632 days ago · 6 km deep · 98 km away
  19. 1.61 km ENE of Aromas, California · 16632 days ago · 7 km deep · 98 km away
  20. 1.61 km ENE of Aromas, California · 16632 days ago · 7 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1061546. Read Tue, Sep 22, 2026, 4:03 PM UTC.