California earthquakes

M2.5 earthquake 2 km ESE of Aromas, California

A magnitude 2.5 earthquake struck 2 km ESE of Aromas, California on Sat, Feb 21, 1981, 7:30 PM PST (03:30 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.8 7 km ENE of San Martin, California. This one was a foreshock.

Aromas 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
2.5 (md), micro
Local time
UTC
1981-02-22 03:30:35 UTC
Depth
7.2 km (4.5 mi), shallow
Epicenter
36.878° N, 121.613° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
56°
Stations used
62

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 180 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 1.711 km SSE of Tres Pinos, California · 16648 days ago · 18 km deep · 37 km away
  2. 2.43 km ESE of Aromas, California · 16648 days ago · 7 km deep · 0 km away
  3. 2.27 km ENE of San Martin, California · 16648 days ago · 3 km deep · 26 km away
  4. 2.87 km ENE of San Martin, California · 16648 days ago · 3 km deep · 26 km away
  5. 1.59 km S of Tres Pinos, California · 16648 days ago · 4 km deep · 31 km away
  6. 3.17 km ENE of San Martin, California · 16648 days ago · 3 km deep · 26 km away
  7. 1.52 km S of San Juan Bautista, California · 16648 days ago · 3 km deep · 10 km away
  8. 1.610 km NNW of Hollister, California · 16647 days ago · 3 km deep · 15 km away
  9. 1.610 km NE of San Martin, CA · 16647 days ago · 8 km deep · 31 km away
  10. 1.67 km ENE of San Martin, California · 16647 days ago · 3 km deep · 26 km away
  11. 1.92 km ESE of Aromas, California · 16647 days ago · 6 km deep · 1 km away
  12. 3.03 km ESE of Aromas, CA · 16647 days ago · 7 km deep · 0 km away
  13. 3.12 km ESE of Aromas, California · 16647 days ago · 7 km deep · 1 km away
  14. 2.53 km ESE of Aromas, CA · 16647 days ago · 7 km deep · 0 km away
  15. 1.5Central California · 16647 days ago · 7 km deep · 0 km away
  16. 3.12 km E of Aromas, California · 16646 days ago · 6 km deep · 1 km away
  17. 1.52 km ESE of Aromas, California · 16646 days ago · 6 km deep · 0 km away
  18. 2.33 km ESE of Aromas, California · 16646 days ago · 7 km deep · 1 km away
  19. 1.621 km NE of Soledad, California · 16645 days ago · 3 km deep · 54 km away
  20. 1.53 km ENE of Tres Pinos, California · 16645 days ago · 10 km deep · 30 km away
  21. 1.58 km ENE of Morgan Hill, California · 16645 days ago · 2 km deep · 32 km away
  22. 1.524 km NE of Greenfield, California · 16644 days ago · 6 km deep · 70 km away
  23. 1.820 km SSE of Tres Pinos, California · 16644 days ago · 4 km deep · 45 km away
  24. 1.813 km NW of Pacific Grove, California · 16643 days ago · 8 km deep · 44 km away
  25. 1.54 km W of Gonzales, California · 16642 days ago · 7 km deep · 43 km away
  26. 1.623 km ENE of Soledad, California · 16642 days ago · 4 km deep · 64 km away
  27. 1.615 km SSE of Livermore, California · 16642 days ago · 2 km deep · 76 km away
  28. 1.615 km SSE of Livermore, California · 16642 days ago · 2 km deep · 76 km away
  29. 1.715 km SSE of Livermore, California · 16642 days ago · 3 km deep · 76 km away
  30. 1.79 km ESE of East Foothills, California · 16641 days ago · 9 km deep · 54 km away
  31. 1.612 km SW of Tres Pinos, California · 16641 days ago · 10 km deep · 27 km away
  32. 2.614 km SSE of Livermore, California · 16641 days ago · 2 km deep · 77 km away
  33. 1.64 km NE of Interlaken, California · 16641 days ago · 12 km deep · 14 km away
  34. 2.04 km NE of Interlaken, California · 16641 days ago · 12 km deep · 14 km away
  35. 1.712 km N of Morgan Hill, California · 16640 days ago · 7 km deep · 41 km away
  36. 2.127 km NE of Soledad, California · 16640 days ago · 6 km deep · 59 km away
  37. 2.34 km E of Fremont, California · 16639 days ago · 10 km deep · 80 km away
  38. 4.45 km E of Fremont, California · 16639 days ago · 12 km deep · 80 km away
  39. 2.25 km E of Fremont, California · 16639 days ago · 10 km deep · 79 km away
  40. 2.15 km E of Fremont, California · 16639 days ago · 9 km deep · 80 km away
  41. 3.05 km E of Fremont, California · 16639 days ago · 11 km deep · 80 km away
  42. 1.74 km E of Fremont, California · 16639 days ago · 8 km deep · 80 km away
  43. 1.65 km E of Fremont, California · 16639 days ago · 9 km deep · 79 km away
  44. 2.45 km E of Fremont, California · 16639 days ago · 9 km deep · 79 km away
  45. 1.64 km E of Fremont, California · 16639 days ago · 14 km deep · 80 km away
  46. 1.65 km E of Fremont, California · 16639 days ago · 6 km deep · 79 km away
  47. 1.86 km E of Fremont, California · 16639 days ago · 9 km deep · 79 km away
  48. 2.15 km E of Fremont, California · 16639 days ago · 9 km deep · 79 km away
  49. 1.75 km E of Fremont, California · 16639 days ago · 9 km deep · 79 km away
  50. 1.85 km E of Fremont, California · 16639 days ago · 9 km deep · 79 km away
  51. 1.73 km E of Fremont, California · 16639 days ago · 8 km deep · 80 km away
  52. 2.05 km E of Fremont, California · 16639 days ago · 9 km deep · 79 km away
  53. 1.74 km E of Fremont, California · 16639 days ago · 9 km deep · 80 km away
  54. 1.65 km E of Fremont, California · 16639 days ago · 10 km deep · 80 km away
  55. 1.84 km E of Fremont, California · 16639 days ago · 9 km deep · 79 km away
  56. 1.85 km SSW of Sunol, California · 16639 days ago · 11 km deep · 80 km away
  57. 2.39 km NNE of Livermore, California · 16639 days ago · 13 km deep · 98 km away
  58. 1.64 km E of Fremont, California · 16639 days ago · 8 km deep · 80 km away
  59. 1.94 km E of Fremont, California · 16638 days ago · 10 km deep · 80 km away
  60. 1.85 km E of Fremont, California · 16638 days ago · 10 km deep · 80 km away

The first 60 of 180.

Before

  1. 1.75 km SW of Gilroy, California · 16649 days ago · 5 km deep · 10 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1060629. Read Tue, Sep 22, 2026, 3:14 PM UTC.