California earthquakes

M1.6 earthquake 23 km ENE of San Ardo, California

A magnitude 1.6 earthquake struck 23 km ENE of San Ardo, California on Mon, Jul 23, 1979, 5:21 AM PDT (12:21 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.1 17 km SSE of Tres Pinos, California. This one was a foreshock.

San Ardo 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1979-07-23 12:21:36 UTC
Depth
2.1 km (1.3 mi), shallow
Epicenter
36.111° N, 120.675° 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, 1.1 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
77°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 110 in the 60 days after this one and 49 in the 30 days before it.

After

  1. 1.915 km NNE of Shandon, California · 17238 days ago · 7 km deep · 48 km away
  2. 2.512 km NE of Shandon, California · 17238 days ago · 9 km deep · 53 km away
  3. 1.722 km ENE of Soledad, California · 17238 days ago · 5 km deep · 59 km away
  4. 2.121 km NE of Soledad, California · 17238 days ago · 5 km deep · 68 km away
  5. 1.81 km SE of Tres Pinos, California · 17237 days ago · 4 km deep · 93 km away
  6. 1.8Central California · 17237 days ago · 0 km deep · 58 km away
  7. 1.727 km ENE of Soledad, California · 17236 days ago · 8 km deep · 60 km away
  8. 1.714 km NW of Parkfield, California · 17236 days ago · 5 km deep · 17 km away
  9. 2.412 km S of Tres Pinos, California · 17236 days ago · 2 km deep · 84 km away
  10. 1.521 km NE of Soledad, California · 17236 days ago · 3 km deep · 66 km away
  11. 2.127 km E of Tres Pinos, California · 17235 days ago · 5 km deep · 80 km away
  12. 1.824 km ENE of Greenfield, California · 17234 days ago · 3 km deep · 47 km away
  13. 1.825 km ENE of Greenfield, California · 17234 days ago · 1 km deep · 46 km away
  14. 2.627 km ENE of Soledad, California · 17234 days ago · 9 km deep · 61 km away
  15. 2.111 km S of Tres Pinos, California · 17233 days ago · 4 km deep · 86 km away
  16. 2.016 km NW of Parkfield, California · 17232 days ago · 5 km deep · 16 km away
  17. 2.523 km NW of Parkfield, California · 17232 days ago · 9 km deep · 9 km away
  18. 1.623 km NW of Parkfield, California · 17232 days ago · 9 km deep · 9 km away
  19. 1.62 km SE of San Ardo, California · 17231 days ago · 9 km deep · 23 km away
  20. 1.623 km NW of Parkfield, California · 17230 days ago · 3 km deep · 9 km away
  21. 2.56 km W of Huron, California · 17229 days ago · 9 km deep · 46 km away
  22. 2.32 km NW of Huron, California · 17229 days ago · 10 km deep · 51 km away
  23. 2.07 km NNE of Huron, California · 17229 days ago · 10 km deep · 56 km away
  24. 2.09 km W of Huron, California · 17229 days ago · 10 km deep · 43 km away
  25. 2.424 km ENE of Soledad, California · 17229 days ago · 3 km deep · 56 km away
  26. 1.621 km NE of Soledad, California · 17229 days ago · 4 km deep · 65 km away
  27. 2.17 km SSW of San Ardo, California · 17229 days ago · 5 km deep · 29 km away
  28. 2.223 km ENE of Soledad, California · 17229 days ago · 3 km deep · 56 km away
  29. 1.821 km NE of Soledad, California · 17228 days ago · 7 km deep · 66 km away
  30. 1.97 km E of Big Sur, California · 17228 days ago · 15 km deep · 95 km away
  31. 1.825 km ENE of Soledad, California · 17228 days ago · 4 km deep · 56 km away
  32. 1.611 km SSE of Tres Pinos, California · 17228 days ago · 12 km deep · 84 km away
  33. 1.736 km SSW of South Dos Palos, California · 17227 days ago · 6 km deep · 64 km away
  34. 2.921 km NE of Soledad, California · 17225 days ago · 2 km deep · 68 km away
  35. 2.0Central California · 17223 days ago · 3 km deep · 66 km away
  36. 2.125 km SSW of Los Banos, California · 17222 days ago · 22 km deep · 84 km away
  37. 1.525 km ENE of Soledad, California · 17222 days ago · 3 km deep · 56 km away
  38. 1.724 km ENE of Greenfield, California · 17219 days ago · 0 km deep · 48 km away
  39. 1.525 km NE of Greenfield, California · 17217 days ago · 2 km deep · 48 km away
  40. 2.940 km W of Lockwood, California · 17217 days ago · 12 km deep · 79 km away
  41. 1.933 km ENE of Soledad, California · 17216 days ago · 19 km deep · 57 km away
  42. 1.830 km SE of Tres Pinos, California · 17216 days ago · 10 km deep · 65 km away
  43. 2.834 km WSW of Three Rocks, California · 17216 days ago · 12 km deep · 31 km away
  44. 2.716 km SSE of Tres Pinos, California · 17215 days ago · 5 km deep · 80 km away
  45. 2.315 km SSE of Tres Pinos, California · 17215 days ago · 4 km deep · 80 km away
  46. 1.716 km SSE of Tres Pinos, California · 17215 days ago · 5 km deep · 80 km away
  47. 1.716 km SSE of Tres Pinos, California · 17214 days ago · 4 km deep · 80 km away
  48. 2.22 km WSW of Ridgemark, California · 17214 days ago · 6 km deep · 100 km away
  49. 1.828 km ENE of Soledad, California · 17213 days ago · 9 km deep · 61 km away
  50. 2.622 km NNE of Soledad, California · 17213 days ago · 2 km deep · 73 km away
  51. 1.58 km NNE of Chualar, California · 17212 days ago · 8 km deep · 94 km away
  52. 2.021 km NE of Soledad, California · 17211 days ago · 6 km deep · 70 km away
  53. 2.110 km SE of Coalinga, California · 17210 days ago · 10 km deep · 36 km away
  54. 2.023 km NE of San Ardo, California · 17210 days ago · 8 km deep · 11 km away
  55. 3.117 km SSE of Tres Pinos, California · 17208 days ago · 10 km deep · 79 km away
  56. 1.91 km NE of Gonzales, California · 17208 days ago · 21 km deep · 81 km away
  57. 2.115 km NW of San Simeon, California · 17207 days ago · 13 km deep · 68 km away
  58. 1.921 km NE of San Ardo, California · 17207 days ago · 6 km deep · 6 km away
  59. 2.117 km SSE of Tres Pinos, California · 17207 days ago · 5 km deep · 79 km away
  60. 2.224 km NE of Greenfield, California · 17205 days ago · 6 km deep · 51 km away

The first 60 of 110.

Before

  1. 3.013 km S of Tres Pinos, California · 17239 days ago · 4 km deep · 83 km away
  2. 1.624 km NE of Greenfield, California · 17240 days ago · 5 km deep · 52 km away
  3. 1.51 km E of Tres Pinos, California · 17240 days ago · 7 km deep · 94 km away
  4. 2.224 km NE of Greenfield, California · 17240 days ago · 6 km deep · 52 km away
  5. 2.913 km NNW of Avenal, California · 17240 days ago · 8 km deep · 42 km away
  6. 1.724 km NE of Greenfield, California · 17242 days ago · 6 km deep · 50 km away
  7. 2.223 km NW of Parkfield, California · 17244 days ago · 4 km deep · 8 km away
  8. 1.59 km SSW of Tres Pinos, California · 17244 days ago · 4 km deep · 90 km away
  9. 2.710 km S of Tres Pinos, California · 17244 days ago · 2 km deep · 86 km away
  10. 2.212 km NNW of Avenal, California · 17244 days ago · 5 km deep · 43 km away
  11. 1.74 km E of Garden Farms, California · 17245 days ago · 5 km deep · 78 km away
  12. 1.75 km SSW of Tres Pinos, California · 17245 days ago · 8 km deep · 93 km away
  13. 1.621 km NE of Soledad, California · 17245 days ago · 2 km deep · 66 km away
  14. 2.421 km NE of Soledad, California · 17246 days ago · 3 km deep · 67 km away
  15. 2.621 km NE of Soledad, California · 17246 days ago · 3 km deep · 66 km away
  16. 3.324 km S of Avenal, California · 17246 days ago · 9 km deep · 63 km away
  17. 1.623 km NE of San Lucas, California · 17247 days ago · 8 km deep · 23 km away
  18. 3.512 km SW of Huron, California · 17248 days ago · 1 km deep · 43 km away
  19. 1.616 km NW of Parkfield, California · 17249 days ago · 4 km deep · 15 km away
  20. 2.48 km SSW of Tres Pinos, California · 17251 days ago · 3 km deep · 92 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1046721. Read Fri, Oct 2, 2026, 7:02 PM UTC.