California earthquakes

M2.3 earthquake 16 km SW of Gustine, California

A magnitude 2.3 earthquake struck 16 km SW of Gustine, California on Wed, Jan 17, 1979, 1:02 PM PST (21:02 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.0 14 km S of Tres Pinos, California. This one was a foreshock.

Gustine 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
2.3 (ma), micro
Local time
UTC
1979-01-17 21:02:44 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
37.156° N, 121.131° 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 0.8 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
92°
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 148 in the 60 days after this one and 68 in the 30 days before it.

After

  1. 1.74 km NNW of Sand City, California · 17419 days ago · 11 km deep · 86 km away
  2. 2.221 km NE of Soledad, California · 17419 days ago · 6 km deep · 66 km away
  3. 1.614 km E of Seven Trees, California · 17419 days ago · 0 km deep · 50 km away
  4. 1.823 km NE of King City, California · 17419 days ago · 4 km deep · 93 km away
  5. 2.24 km SE of Alum Rock, California · 17418 days ago · 3 km deep · 61 km away
  6. 1.84 km SE of Alum Rock, California · 17418 days ago · 2 km deep · 62 km away
  7. 1.75 km ESE of Alum Rock, California · 17418 days ago · 3 km deep · 61 km away
  8. 2.34 km ESE of Alum Rock, California · 17418 days ago · 2 km deep · 62 km away
  9. 2.04 km ESE of Alum Rock, California · 17418 days ago · 2 km deep · 62 km away
  10. 2.35 km ESE of East Foothills, California · 17418 days ago · 0 km deep · 60 km away
  11. 2.24 km SE of Alum Rock, California · 17418 days ago · 2 km deep · 62 km away
  12. 1.84 km E of East Foothills, California · 17418 days ago · 0 km deep · 62 km away
  13. 1.810 km ESE of East Foothills, California · 17417 days ago · 7 km deep · 55 km away
  14. 3.110 km ESE of East Foothills, California · 17417 days ago · 8 km deep · 55 km away
  15. 2.110 km ESE of East Foothills, California · 17417 days ago · 7 km deep · 55 km away
  16. 2.728 km WSW of Mendota, California · 17417 days ago · 6 km deep · 70 km away
  17. 1.65 km SE of Alum Rock, California · 17417 days ago · 3 km deep · 61 km away
  18. 3.15 km S of Gilroy, California · 17417 days ago · 7 km deep · 45 km away
  19. 1.58 km NNE of Interlaken, California · 17417 days ago · 10 km deep · 54 km away
  20. 1.74 km SE of Alum Rock, California · 17415 days ago · 2 km deep · 62 km away
  21. 1.7Northern California · 17415 days ago · 3 km deep · 61 km away
  22. 1.629 km ENE of Soledad, California · 17414 days ago · 4 km deep · 66 km away
  23. 2.54 km SE of Alum Rock, California · 17414 days ago · 3 km deep · 62 km away
  24. 1.55 km SE of Alum Rock, California · 17414 days ago · 2 km deep · 61 km away
  25. 1.66 km NE of Ridgemark, California · 17413 days ago · 2 km deep · 37 km away
  26. 2.620 km NE of Morgan Hill, California · 17413 days ago · 2 km deep · 32 km away
  27. 1.64 km S of Loyola, California · 17413 days ago · 7 km deep · 88 km away
  28. 2.1Central California · 17412 days ago · 7 km deep · 66 km away
  29. 2.08 km NNE of Interlaken, California · 17412 days ago · 10 km deep · 54 km away
  30. 3.03 km W of San Juan Bautista, California · 17410 days ago · 7 km deep · 53 km away
  31. 3.13 km W of San Juan Bautista, California · 17410 days ago · 6 km deep · 52 km away
  32. 2.45 km ESE of East Foothills, California · 17409 days ago · 1 km deep · 60 km away
  33. 1.72 km SW of Livermore, California · 17409 days ago · 8 km deep · 81 km away
  34. 1.812 km NE of Morgan Hill, California · 17407 days ago · 5 km deep · 37 km away
  35. 1.69 km SSW of Tres Pinos, California · 17407 days ago · 2 km deep · 53 km away
  36. 3.510km WSW of Salida, CA · 17403 days ago · 18 km deep · 56 km away
  37. 1.624 km NE of Greenfield, California · 17403 days ago · 5 km deep · 77 km away
  38. 2.08 km WSW of Westley, California · 17402 days ago · 0 km deep · 43 km away
  39. 2.62 km SW of Ridgemark, California · 17402 days ago · 3 km deep · 46 km away
  40. 2.06 km WSW of Gilroy, California · 17402 days ago · 6 km deep · 49 km away
  41. 3.414 km E of Seven Trees, California · 17401 days ago · 8 km deep · 51 km away
  42. 2.722 km NNE of Soledad, California · 17400 days ago · 7 km deep · 62 km away
  43. 2.110 km WSW of Ridgemark, California · 17400 days ago · 7 km deep · 52 km away
  44. 1.822 km NNE of Soledad, California · 17400 days ago · 6 km deep · 62 km away
  45. 1.85 km SW of Gilroy, California · 17399 days ago · 6 km deep · 47 km away
  46. 1.625 km ENE of Soledad, California · 17398 days ago · 8 km deep · 68 km away
  47. 1.87 km NNE of East Foothills, California · 17398 days ago · 6 km deep · 68 km away
  48. 2.124 km ENE of Greenfield, California · 17396 days ago · 5 km deep · 84 km away
  49. 1.65 km SSW of Tres Pinos, California · 17396 days ago · 8 km deep · 50 km away
  50. 1.76 km NE of East Foothills, California · 17396 days ago · 8 km deep · 64 km away
  51. 1.824 km ENE of King City, California · 17395 days ago · 4 km deep · 94 km away
  52. 2.54 km SSW of Gilroy, California · 17395 days ago · 7 km deep · 46 km away
  53. 2.324 km ENE of Greenfield, California · 17395 days ago · 6 km deep · 84 km away
  54. 3.612 km S of Tres Pinos, California · 17393 days ago · 4 km deep · 55 km away
  55. 2.512 km S of Tres Pinos, California · 17393 days ago · 4 km deep · 55 km away
  56. 3.112 km S of Tres Pinos, California · 17393 days ago · 4 km deep · 55 km away
  57. 4.014 km S of Tres Pinos, California · 17393 days ago · 6 km deep · 57 km away
  58. 1.811 km S of Tres Pinos, California · 17393 days ago · 4 km deep · 55 km away
  59. 2.512 km S of Tres Pinos, California · 17393 days ago · 4 km deep · 55 km away
  60. 1.823 km NE of King City, California · 17393 days ago · 5 km deep · 87 km away

The first 60 of 148.

Before

  1. 2.816 km SW of Gustine, California · 17419 days ago · 0 km deep · 2 km away
  2. 1.95 km E of East Foothills, California · 17419 days ago · 0 km deep · 60 km away
  3. 1.725 km NE of Greenfield, California · 17420 days ago · 2 km deep · 79 km away
  4. 2.221 km NE of Soledad, California · 17420 days ago · 6 km deep · 66 km away
  5. 1.76 km E of Sunol, California · 17420 days ago · 9 km deep · 77 km away
  6. 1.823 km NNE of San Lucas, California · 17421 days ago · 5 km deep · 97 km away
  7. 1.95 km E of East Foothills, California · 17422 days ago · 0 km deep · 60 km away
  8. 1.82 km WNW of Cambrian Park, California · 17422 days ago · 7 km deep · 74 km away
  9. 1.82 km W of Cambrian Park, California · 17422 days ago · 7 km deep · 74 km away
  10. 1.96 km E of East Foothills, California · 17422 days ago · 1 km deep · 60 km away
  11. 1.521 km SSE of Tres Pinos, California · 17423 days ago · 5 km deep · 61 km away
  12. 2.120 km SSE of Tres Pinos, California · 17423 days ago · 6 km deep · 60 km away
  13. 2.38 km ENE of San Martin, California · 17423 days ago · 8 km deep · 35 km away
  14. 3.123 km NE of King City, California · 17424 days ago · 7 km deep · 92 km away
  15. 1.78 km NW of Hollister, California · 17425 days ago · 6 km deep · 41 km away
  16. 1.95 km E of East Foothills, California · 17425 days ago · 0 km deep · 60 km away
  17. 2.115 km SW of Santa Cruz, California · 17425 days ago · 8 km deep · 95 km away
  18. 2.95 km E of East Foothills, California · 17425 days ago · 0 km deep · 60 km away
  19. 3.65 km E of East Foothills, California · 17425 days ago · 0 km deep · 60 km away
  20. 2.38 km N of Interlaken, California · 17425 days ago · 9 km deep · 54 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1044227. Read Sun, Sep 27, 2026, 12:39 AM UTC.