California earthquakes

M1.7 earthquake 20 km W of Volta, California

A magnitude 1.7 earthquake struck 20 km W of Volta, California on Wed, Sep 23, 1981, 9:20 AM PDT (16:20 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.3 30 km ENE of Soledad, 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
1.7 (md), micro
Local time
UTC
1981-09-23 16:20:20 UTC
Depth
0.3 km (0.2 mi), shallow
Epicenter
37.088° N, 121.159° 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 0.3 km horizontally, 8.6 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
142°
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 136 in the 60 days after this one and 35 in the 30 days before it.

After

  1. 2.330 km ENE of Soledad, California · 16435 days ago · 7 km deep · 59 km away
  2. 1.923 km ENE of Soledad, California · 16434 days ago · 3 km deep · 66 km away
  3. 3.23 km S of San Juan Bautista, California · 16434 days ago · 8 km deep · 46 km away
  4. 3.13 km S of San Juan Bautista, California · 16434 days ago · 7 km deep · 45 km away
  5. 1.64 km S of San Juan Bautista, California · 16434 days ago · 7 km deep · 46 km away
  6. 2.123 km NE of San Lucas, California · 16433 days ago · 7 km deep · 98 km away
  7. 1.84 km SW of Tres Pinos, California · 16433 days ago · 8 km deep · 40 km away
  8. 1.85 km E of Fremont, California · 16432 days ago · 9 km deep · 85 km away
  9. 2.118 km SSE of Tres Pinos, California · 16432 days ago · 5 km deep · 51 km away
  10. 1.75 km SSW of Gilroy, California · 16432 days ago · 4 km deep · 41 km away
  11. 2.39 km ESE of East Foothills, California · 16431 days ago · 8 km deep · 57 km away
  12. 2.49 km NE of Gilroy, California · 16431 days ago · 9 km deep · 30 km away
  13. 1.927 km ENE of King City, California · 16431 days ago · 9 km deep · 86 km away
  14. 2.123 km NE of Soledad, California · 16431 days ago · 9 km deep · 58 km away
  15. 3.131 km NE of Soledad, California · 16430 days ago · 8 km deep · 55 km away
  16. 1.67 km SSE of Gilroy, California · 16430 days ago · 5 km deep · 38 km away
  17. 4.03 km S of San Juan Bautista, California · 16430 days ago · 9 km deep · 46 km away
  18. 1.812 km ESE of Tres Pinos, California · 16430 days ago · 10 km deep · 40 km away
  19. 2.44 km S of San Juan Bautista, California · 16430 days ago · 9 km deep · 46 km away
  20. 1.54 km S of San Juan Bautista, California · 16430 days ago · 8 km deep · 46 km away
  21. 2.34 km S of San Juan Bautista, California · 16430 days ago · 7 km deep · 45 km away
  22. 2.54 km SSE of San Juan Bautista, California · 16430 days ago · 7 km deep · 45 km away
  23. 2.44 km SSE of San Juan Bautista, California · 16430 days ago · 7 km deep · 45 km away
  24. 2.13 km SSW of San Juan Bautista, California · 16429 days ago · 7 km deep · 46 km away
  25. 2.74 km S of San Juan Bautista, California · 16429 days ago · 7 km deep · 46 km away
  26. 1.623 km NE of San Lucas, California · 16428 days ago · 5 km deep · 92 km away
  27. 3.222 km NE of Soledad, California · 16427 days ago · 7 km deep · 55 km away
  28. 1.921 km NE of Soledad, California · 16427 days ago · 6 km deep · 56 km away
  29. 1.813 km S of Tres Pinos, California · 16427 days ago · 3 km deep · 48 km away
  30. 1.54 km SSE of Diablo Grande, California · 16425 days ago · 8 km deep · 32 km away
  31. 1.89 km NE of Milpitas, California · 16425 days ago · 7 km deep · 76 km away
  32. 1.921 km NE of Soledad, California · 16424 days ago · 6 km deep · 56 km away
  33. 2.322 km SE of Livermore, California · 16423 days ago · 7 km deep · 64 km away
  34. 2.33 km S of San Juan Bautista, California · 16423 days ago · 7 km deep · 46 km away
  35. 2.010 km SW of Ridgemark, California · 16423 days ago · 10 km deep · 46 km away
  36. 1.86 km SE of Lexington Hills, California · 16422 days ago · 13 km deep · 67 km away
  37. 2.110 km SSW of Tracy, California · 16422 days ago · 9 km deep · 68 km away
  38. 2.123 km ENE of Soledad, California · 16422 days ago · 5 km deep · 65 km away
  39. 2.227 km E of Tres Pinos, California · 16421 days ago · 3 km deep · 40 km away
  40. 1.94 km SSE of San Juan Bautista, California · 16421 days ago · 7 km deep · 45 km away
  41. 1.621 km NE of Soledad, California · 16421 days ago · 3 km deep · 58 km away
  42. 1.57 km WSW of Ridgemark, California · 16420 days ago · 9 km deep · 41 km away
  43. 1.67 km WSW of Ridgemark, California · 16420 days ago · 9 km deep · 42 km away
  44. 1.625 km NE of Greenfield, California · 16420 days ago · 1 km deep · 72 km away
  45. 1.66 km SW of Gilroy, California · 16420 days ago · 5 km deep · 44 km away
  46. 2.013 km S of Tres Pinos, California · 16420 days ago · 2 km deep · 48 km away
  47. 2.07 km WSW of Ridgemark, California · 16420 days ago · 9 km deep · 42 km away
  48. 1.76 km NE of East Foothills, California · 16420 days ago · 8 km deep · 65 km away
  49. 1.923 km NE of King City, California · 16419 days ago · 4 km deep · 84 km away
  50. 1.732 km W of Three Rocks, California · 16418 days ago · 12 km deep · 71 km away
  51. 2.19 km ESE of East Foothills, California · 16416 days ago · 7 km deep · 57 km away
  52. 2.87 km WSW of Ridgemark, California · 16415 days ago · 9 km deep · 42 km away
  53. 1.79 km NNW of Hollister, California · 16414 days ago · 10 km deep · 32 km away
  54. 1.610 km ESE of Gilroy, California · 16413 days ago · 5 km deep · 30 km away
  55. 2.021 km NE of Soledad, California · 16413 days ago · 6 km deep · 57 km away
  56. 1.82 km ESE of Tres Pinos, California · 16413 days ago · 8 km deep · 36 km away
  57. 1.528 km NE of San Lucas, California · 16412 days ago · 9 km deep · 93 km away
  58. 1.510 km ESE of Gilroy, California · 16412 days ago · 5 km deep · 30 km away
  59. 2.03 km ESE of Tres Pinos, California · 16412 days ago · 7 km deep · 36 km away
  60. 1.630 km SW of South Dos Palos, California · 16410 days ago · 1 km deep · 44 km away

The first 60 of 136.

Before

  1. 1.82 km E of Tres Pinos, California · 16435 days ago · 8 km deep · 35 km away
  2. 2.44 km SW of Tres Pinos, California · 16436 days ago · 9 km deep · 40 km away
  3. 2.03 km SW of Davenport, California · 16436 days ago · 11 km deep · 95 km away
  4. 2.121 km NE of Soledad, California · 16437 days ago · 4 km deep · 58 km away
  5. 3.313 km SSE of Tres Pinos, California · 16437 days ago · 3 km deep · 48 km away
  6. 2.19 km ESE of East Foothills, California · 16437 days ago · 5 km deep · 58 km away
  7. 1.521 km ENE of East Foothills, California · 16438 days ago · 6 km deep · 58 km away
  8. 2.424 km ENE of Soledad, California · 16438 days ago · 3 km deep · 66 km away
  9. 1.511 km SSE of Tres Pinos, California · 16440 days ago · 16 km deep · 46 km away
  10. 1.714 km E of Seven Trees, California · 16440 days ago · 4 km deep · 51 km away
  11. 1.638 km W of Three Rocks, California · 16440 days ago · 4 km deep · 67 km away
  12. 1.69 km SSW of Tres Pinos, California · 16441 days ago · 2 km deep · 46 km away
  13. 2.54 km SW of Tres Pinos, California · 16441 days ago · 9 km deep · 40 km away
  14. 1.615 km N of Morgan Hill, California · 16442 days ago · 6 km deep · 47 km away
  15. 1.615 km N of Morgan Hill, California · 16442 days ago · 6 km deep · 47 km away
  16. 2.011 km SSW of Loyola, California · 16444 days ago · 9 km deep · 91 km away
  17. 1.65 km SW of Ridgemark, California · 16444 days ago · 9 km deep · 41 km away
  18. 2.113 km S of Tres Pinos, California · 16444 days ago · 3 km deep · 48 km away
  19. 3.313 km S of Tres Pinos, California · 16444 days ago · 4 km deep · 48 km away
  20. 2.67 km W of Gilroy, California · 16445 days ago · 4 km deep · 45 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1067859. Read Tue, Sep 22, 2026, 3:48 PM UTC.