California earthquakes

M1.7 earthquake 21 km NE of Soledad, California

A magnitude 1.7 earthquake struck 21 km NE of Soledad, California on Sun, Aug 27, 1978, 5:24 PM PDT (00:24 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.9 10 km S of Tres Pinos, California. This one was a foreshock.

Soledad 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
1.7 (md), micro
Local time
UTC
1978-08-28 00:24:10 UTC
Depth
5.2 km (3.3 mi), shallow
Epicenter
36.542° 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 0.2 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
60°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 149 in the 60 days after this one and 51 in the 30 days before it.

After

  1. 2.32 km ESE of Tres Pinos, California · 17565 days ago · 9 km deep · 31 km away
  2. 1.92 km ESE of Aromas, California · 17565 days ago · 7 km deep · 58 km away
  3. 3.021 km NE of Soledad, California · 17564 days ago · 7 km deep · 0 km away
  4. 2.616 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 17 km away
  5. 1.816 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 18 km away
  6. 2.016 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 17 km away
  7. 2.216 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 17 km away
  8. 2.415 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 18 km away
  9. 2.0Central California · 17562 days ago · 2 km deep · 9 km away
  10. 1.713 km E of Seven Trees, California · 17559 days ago · 1 km deep · 97 km away
  11. 1.87 km NE of Interlaken, California · 17559 days ago · 4 km deep · 70 km away
  12. 1.915 km SW of Los Banos, California · 17559 days ago · 6 km deep · 49 km away
  13. 2.323 km NE of Greenfield, California · 17558 days ago · 9 km deep · 11 km away
  14. 1.513 km NW of Parkfield, California · 17558 days ago · 5 km deep · 81 km away
  15. 1.92 km ENE of Ridgemark, California · 17557 days ago · 6 km deep · 37 km away
  16. 1.621 km NE of Soledad, California · 17557 days ago · 0 km deep · 7 km away
  17. 2.522 km ENE of San Ardo, California · 17557 days ago · 6 km deep · 61 km away
  18. 2.222 km ENE of San Lucas, California · 17557 days ago · 9 km deep · 44 km away
  19. 1.79 km ESE of Gilroy, California · 17556 days ago · 4 km deep · 57 km away
  20. 1.814 km NW of Parkfield, California · 17556 days ago · 5 km deep · 80 km away
  21. 1.612 km SW of Soledad, California · 17555 days ago · 11 km deep · 34 km away
  22. 2.125 km NNE of King City, California · 17555 days ago · 1 km deep · 20 km away
  23. 2.59 km SSE of Tres Pinos, California · 17554 days ago · 5 km deep · 23 km away
  24. 1.86 km NE of Ridgemark, California · 17554 days ago · 5 km deep · 39 km away
  25. 1.623 km NE of King City, California · 17553 days ago · 2 km deep · 28 km away
  26. 2.017 km NW of Parkfield, California · 17553 days ago · 5 km deep · 78 km away
  27. 1.63 km NE of Tres Pinos, California · 17553 days ago · 8 km deep · 34 km away
  28. 2.35 km ENE of Aromas, California · 17552 days ago · 8 km deep · 58 km away
  29. 2.310 km S of Tres Pinos, California · 17551 days ago · 3 km deep · 25 km away
  30. 3.410 km S of Tres Pinos, California · 17551 days ago · 4 km deep · 25 km away
  31. 1.610 km S of Tres Pinos, California · 17551 days ago · 3 km deep · 24 km away
  32. 1.929 km SE of Big Sur, California · 17548 days ago · 10 km deep · 67 km away
  33. 2.26 km NW of Parkfield, California · 17548 days ago · 10 km deep · 88 km away
  34. 1.66 km NW of Parkfield, California · 17548 days ago · 10 km deep · 88 km away
  35. 1.627 km NE of Soledad, California · 17548 days ago · 9 km deep · 6 km away
  36. 1.510 km S of Tres Pinos, California · 17547 days ago · 3 km deep · 25 km away
  37. 3.210 km S of Tres Pinos, California · 17546 days ago · 4 km deep · 25 km away
  38. 1.99 km S of Tres Pinos, California · 17546 days ago · 4 km deep · 26 km away
  39. 2.19 km S of Tres Pinos, California · 17546 days ago · 3 km deep · 25 km away
  40. 1.79 km S of Tres Pinos, California · 17546 days ago · 4 km deep · 25 km away
  41. 1.89 km S of Tres Pinos, California · 17546 days ago · 4 km deep · 25 km away
  42. 2.36 km NE of Ridgemark, California · 17545 days ago · 6 km deep · 37 km away
  43. 1.75 km SSE of San Juan Bautista, California · 17545 days ago · 5 km deep · 44 km away
  44. 1.89 km S of Tres Pinos, California · 17545 days ago · 4 km deep · 26 km away
  45. 3.39 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 25 km away
  46. 3.010 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 25 km away
  47. 2.410 km S of Tres Pinos, California · 17544 days ago · 5 km deep · 25 km away
  48. 1.610 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 25 km away
  49. 2.910 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 24 km away
  50. 3.910 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 25 km away
  51. 2.810 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 25 km away
  52. 2.5Central California · 17544 days ago · 1 km deep · 13 km away
  53. 1.69 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 25 km away
  54. 3.810 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 25 km away
  55. 2.2Central California · 17544 days ago · 4 km deep · 25 km away
  56. 2.410 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 24 km away
  57. 2.710 km S of Tres Pinos, California · 17544 days ago · 5 km deep · 25 km away
  58. 2.210 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 24 km away
  59. 1.8Central California · 17544 days ago · 4 km deep · 24 km away
  60. 2.3Central California · 17544 days ago · 4 km deep · 24 km away

The first 60 of 149.

Before

  1. 1.53 km W of Ridgemark, California · 17565 days ago · 7 km deep · 39 km away
  2. 2.23 km NNW of Hollister, California · 17565 days ago · 7 km deep · 46 km away
  3. 1.78 km NE of Gilroy, California · 17565 days ago · 8 km deep · 65 km away
  4. 1.64 km SW of Tres Pinos, California · 17568 days ago · 6 km deep · 31 km away
  5. 1.723 km ENE of Soledad, California · 17570 days ago · 6 km deep · 8 km away
  6. 1.72 km SW of San Juan Bautista, California · 17570 days ago · 7 km deep · 50 km away
  7. 1.68 km N of Morgan Hill, California · 17571 days ago · 4 km deep · 87 km away
  8. 1.821 km NE of Soledad, California · 17571 days ago · 5 km deep · 5 km away
  9. 2.124 km E of Tres Pinos, California · 17573 days ago · 1 km deep · 27 km away
  10. 2.024 km E of Tres Pinos, California · 17573 days ago · 0 km deep · 27 km away
  11. 1.922 km NE of San Lucas, California · 17573 days ago · 6 km deep · 39 km away
  12. 2.237 km SE of Big Sur, California · 17574 days ago · 10 km deep · 72 km away
  13. 1.86 km NNE of Ridgemark, California · 17574 days ago · 6 km deep · 40 km away
  14. 2.6Central California · 17575 days ago · 7 km deep · 50 km away
  15. 2.330 km SSW of South Dos Palos, California · 17575 days ago · 6 km deep · 34 km away
  16. 2.323 km NNE of San Lucas, California · 17576 days ago · 6 km deep · 35 km away
  17. 2.3Central California · 17576 days ago · 2 km deep · 11 km away
  18. 1.69 km NW of Hollister, California · 17576 days ago · 4 km deep · 52 km away
  19. 1.67 km NNE of Corralitos, California · 17576 days ago · 13 km deep · 81 km away
  20. 2.421 km NE of Soledad, California · 17576 days ago · 5 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1041909. Read Tue, Sep 29, 2026, 6:10 PM UTC.