California earthquakes

M2.1 earthquake 1 km SSW of Tres Pinos, California

A magnitude 2.1 earthquake struck 1 km SSW of Tres Pinos, California on Sat, Feb 21, 1981, 4:09 PM PST (00:09 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.5 2 km ESE of Aromas, 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
2.1 (md), micro
Local time
UTC
1981-02-22 00:09:11 UTC
Depth
6.5 km (4.0 mi), shallow
Epicenter
36.776° N, 121.326° 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, 0.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
27°
Stations used
52

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 157 in the 60 days after this one and 22 in the 30 days before it.

After

  1. 1.75 km SW of Gilroy, California · 16649 days ago · 5 km deep · 33 km away
  2. 2.52 km ESE of Aromas, California · 16649 days ago · 7 km deep · 28 km away
  3. 1.711 km SSE of Tres Pinos, California · 16649 days ago · 18 km deep · 11 km away
  4. 2.43 km ESE of Aromas, California · 16648 days ago · 7 km deep · 28 km away
  5. 2.27 km ENE of San Martin, California · 16648 days ago · 3 km deep · 41 km away
  6. 2.87 km ENE of San Martin, California · 16648 days ago · 3 km deep · 41 km away
  7. 1.59 km S of Tres Pinos, California · 16648 days ago · 4 km deep · 8 km away
  8. 3.17 km ENE of San Martin, California · 16648 days ago · 3 km deep · 41 km away
  9. 1.52 km S of San Juan Bautista, California · 16648 days ago · 3 km deep · 19 km away
  10. 1.610 km NNW of Hollister, California · 16648 days ago · 3 km deep · 21 km away
  11. 1.610 km NE of San Martin, CA · 16648 days ago · 8 km deep · 45 km away
  12. 1.67 km ENE of San Martin, California · 16647 days ago · 3 km deep · 41 km away
  13. 1.92 km ESE of Aromas, California · 16647 days ago · 6 km deep · 28 km away
  14. 3.03 km ESE of Aromas, CA · 16647 days ago · 7 km deep · 28 km away
  15. 3.12 km ESE of Aromas, California · 16647 days ago · 7 km deep · 29 km away
  16. 2.53 km ESE of Aromas, CA · 16647 days ago · 7 km deep · 28 km away
  17. 1.5Central California · 16647 days ago · 7 km deep · 28 km away
  18. 3.12 km E of Aromas, California · 16647 days ago · 6 km deep · 29 km away
  19. 1.52 km ESE of Aromas, California · 16646 days ago · 6 km deep · 28 km away
  20. 2.33 km ESE of Aromas, California · 16646 days ago · 7 km deep · 27 km away
  21. 1.621 km NE of Soledad, California · 16646 days ago · 3 km deep · 29 km away
  22. 1.53 km ENE of Tres Pinos, California · 16645 days ago · 10 km deep · 5 km away
  23. 1.58 km ENE of Morgan Hill, California · 16645 days ago · 2 km deep · 48 km away
  24. 1.524 km NE of Greenfield, California · 16645 days ago · 6 km deep · 44 km away
  25. 1.820 km SSE of Tres Pinos, California · 16644 days ago · 4 km deep · 19 km away
  26. 1.813 km NW of Pacific Grove, California · 16643 days ago · 8 km deep · 64 km away
  27. 1.54 km W of Gonzales, California · 16643 days ago · 7 km deep · 34 km away
  28. 1.623 km ENE of Soledad, California · 16642 days ago · 4 km deep · 38 km away
  29. 1.615 km SSE of Livermore, California · 16642 days ago · 2 km deep · 93 km away
  30. 1.615 km SSE of Livermore, California · 16642 days ago · 2 km deep · 93 km away
  31. 1.715 km SSE of Livermore, California · 16642 days ago · 3 km deep · 93 km away
  32. 1.79 km ESE of East Foothills, California · 16642 days ago · 9 km deep · 73 km away
  33. 1.612 km SW of Tres Pinos, California · 16642 days ago · 10 km deep · 11 km away
  34. 2.614 km SSE of Livermore, California · 16642 days ago · 2 km deep · 93 km away
  35. 1.64 km NE of Interlaken, California · 16642 days ago · 12 km deep · 40 km away
  36. 2.04 km NE of Interlaken, California · 16642 days ago · 12 km deep · 40 km away
  37. 2.723 km NE of San Ardo, California · 16641 days ago · 8 km deep · 86 km away
  38. 1.712 km N of Morgan Hill, California · 16641 days ago · 7 km deep · 60 km away
  39. 2.127 km NE of Soledad, California · 16641 days ago · 6 km deep · 32 km away
  40. 1.66 km ENE of East Foothills, California · 16638 days ago · 4 km deep · 80 km away
  41. 1.824 km NE of Greenfield, California · 16638 days ago · 1 km deep · 43 km away
  42. 1.78 km NE of Gilroy, California · 16638 days ago · 4 km deep · 35 km away
  43. 1.523 km ENE of Soledad, California · 16637 days ago · 4 km deep · 37 km away
  44. 1.79 km E of San Martin, California · 16637 days ago · 8 km deep · 38 km away
  45. 1.915 km SSE of Tres Pinos, California · 16636 days ago · 3 km deep · 14 km away
  46. 2.12 km ESE of Aromas, California · 16635 days ago · 8 km deep · 29 km away
  47. 2.522 km NE of Soledad, California · 16635 days ago · 4 km deep · 24 km away
  48. 1.824 km NE of Greenfield, California · 16635 days ago · 7 km deep · 41 km away
  49. 3.22 km ESE of Aromas, California · 16634 days ago · 8 km deep · 29 km away
  50. 1.73 km SW of Davenport, California · 16634 days ago · 7 km deep · 83 km away
  51. 2.714 km E of Seven Trees, California · 16634 days ago · 7 km deep · 67 km away
  52. 1.719 km SSE of Tres Pinos, California · 16633 days ago · 7 km deep · 18 km away
  53. 3.31 km ENE of Aromas, California · 16632 days ago · 7 km deep · 30 km away
  54. 1.61 km ENE of Aromas, California · 16632 days ago · 7 km deep · 30 km away
  55. 1.61 km ENE of Aromas, California · 16632 days ago · 7 km deep · 30 km away
  56. 1.60 km ENE of Aromas, California · 16632 days ago · 6 km deep · 30 km away
  57. 2.21 km ENE of Aromas, California · 16632 days ago · 7 km deep · 30 km away
  58. 2.13 km ESE of Aromas, California · 16631 days ago · 6 km deep · 28 km away
  59. 1.813 km N of Morgan Hill, California · 16629 days ago · 6 km deep · 59 km away
  60. 1.68 km ENE of Gilroy, California · 16628 days ago · 7 km deep · 33 km away

The first 60 of 157.

Before

  1. 2.22 km ESE of Aromas, California · 16649 days ago · 7 km deep · 28 km away
  2. 3.010 km S of Davenport, California · 16649 days ago · 9 km deep · 78 km away
  3. 2.52 km ESE of Aromas, California · 16649 days ago · 7 km deep · 28 km away
  4. 1.726 km NE of Soledad, California · 16649 days ago · 8 km deep · 31 km away
  5. 1.78 km SSW of Tres Pinos, California · 16650 days ago · 3 km deep · 7 km away
  6. 1.62 km ESE of Aromas, California · 16650 days ago · 7 km deep · 28 km away
  7. 2.12 km ESE of Aromas, California · 16650 days ago · 7 km deep · 28 km away
  8. 3.01 km ESE of Aromas, California · 16650 days ago · 9 km deep · 29 km away
  9. 1.74 km SSE of San Juan Bautista, California · 16650 days ago · 5 km deep · 18 km away
  10. 2.75 km ENE of East Foothills, California · 16650 days ago · 5 km deep · 80 km away
  11. 1.79 km NNE of Hollister, California · 16650 days ago · 6 km deep · 17 km away
  12. 1.621 km NE of Soledad, California · 16651 days ago · 7 km deep · 29 km away
  13. 1.69 km ESE of Gilroy, California · 16651 days ago · 5 km deep · 26 km away
  14. 1.69 km ESE of East Foothills, California · 16651 days ago · 9 km deep · 74 km away
  15. 2.49 km ESE of Gilroy, California · 16652 days ago · 5 km deep · 26 km away
  16. 1.825 km NE of King City, California · 16652 days ago · 8 km deep · 53 km away
  17. 1.59 km SSW of Tres Pinos, California · 16652 days ago · 3 km deep · 8 km away
  18. 1.63 km S of San Juan Bautista, California · 16653 days ago · 6 km deep · 19 km away
  19. 2.3Northern California · 16653 days ago · 8 km deep · 83 km away
  20. 1.824 km ENE of Greenfield, California · 16653 days ago · 7 km deep · 48 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1060621. Read Tue, Sep 22, 2026, 9:40 PM UTC.