California earthquakes

M1.8 earthquake 21 km NNE of Soledad, California

A magnitude 1.8 earthquake struck 21 km NNE of Soledad, California on Tue, Feb 21, 1978, 8:57 AM PST (16:57 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.1 9 km SSE of San Juan Bautista, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1978-02-21 16:57:43 UTC
Depth
7.8 km (4.8 mi), shallow
Epicenter
36.590° N, 121.197° 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, 0.6 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
39°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 103 in the 60 days after this one and 71 in the 30 days before it.

After

  1. 1.625 km SE of Tres Pinos, California · 17753 days ago · 7 km deep · 7 km away
  2. 1.722 km NE of San Ardo, California · 17753 days ago · 7 km deep · 60 km away
  3. 2.827 km W of Three Rocks, California · 17752 days ago · 8 km deep · 45 km away
  4. 2.216 km N of Morgan Hill, California · 17752 days ago · 6 km deep · 87 km away
  5. 1.54 km SE of Tres Pinos, California · 17752 days ago · 8 km deep · 21 km away
  6. 2.423 km NNE of San Lucas, California · 17751 days ago · 5 km deep · 42 km away
  7. 2.78 km SSE of San Juan Bautista, California · 17751 days ago · 7 km deep · 34 km away
  8. 1.737 km SSW of South Dos Palos, California · 17751 days ago · 7 km deep · 31 km away
  9. 1.737 km SSW of South Dos Palos, California · 17750 days ago · 6 km deep · 31 km away
  10. 2.015 km NW of Parkfield, California · 17750 days ago · 5 km deep · 87 km away
  11. 1.6Northern California · 17749 days ago · 2 km deep · 90 km away
  12. 2.51 km NE of Hollister, California · 17749 days ago · 8 km deep · 35 km away
  13. 1.61 km ENE of Hollister, California · 17749 days ago · 8 km deep · 34 km away
  14. 1.7Central California · 17748 days ago · 11 km deep · 35 km away
  15. 2.0Central California · 17748 days ago · 7 km deep · 73 km away
  16. 1.7Central California · 17748 days ago · 5 km deep · 44 km away
  17. 2.4Central California · 17747 days ago · 8 km deep · 17 km away
  18. 2.723 km ENE of San Lucas, California · 17747 days ago · 8 km deep · 56 km away
  19. 2.42 km WSW of San Juan Bautista, California · 17746 days ago · 7 km deep · 43 km away
  20. 2.17 km NE of San Martin, California · 17745 days ago · 1 km deep · 69 km away
  21. 1.621 km NE of Soledad, California · 17744 days ago · 4 km deep · 3 km away
  22. 2.422 km ENE of Soledad, California · 17743 days ago · 4 km deep · 12 km away
  23. 2.622 km ENE of Soledad, California · 17743 days ago · 5 km deep · 13 km away
  24. 1.922 km ENE of Soledad, California · 17743 days ago · 5 km deep · 13 km away
  25. 1.631 km NE of Soledad, California · 17743 days ago · 6 km deep · 14 km away
  26. 1.921 km NE of Soledad, California · 17743 days ago · 7 km deep · 1 km away
  27. 1.624 km NE of Greenfield, California · 17741 days ago · 5 km deep · 23 km away
  28. 1.88 km SSE of San Juan Bautista, California · 17741 days ago · 7 km deep · 34 km away
  29. 2.211 km S of Tres Pinos, California · 17740 days ago · 3 km deep · 14 km away
  30. 1.923 km NW of Parkfield, California · 17739 days ago · 6 km deep · 79 km away
  31. 1.922 km ENE of Soledad, California · 17737 days ago · 4 km deep · 10 km away
  32. 2.222 km ENE of Soledad, California · 17737 days ago · 4 km deep · 10 km away
  33. 2.37 km SE of Alum Rock, California · 17737 days ago · 3 km deep · 96 km away
  34. 2.124 km ENE of Soledad, California · 17737 days ago · 2 km deep · 15 km away
  35. 1.64 km SW of Ridgemark, California · 17736 days ago · 7 km deep · 29 km away
  36. 2.57 km NE of Interlaken, California · 17736 days ago · 11 km deep · 62 km away
  37. 1.523 km ENE of Soledad, California · 17736 days ago · 4 km deep · 13 km away
  38. 1.627 km NE of Soledad, California · 17735 days ago · 5 km deep · 8 km away
  39. 2.43 km ESE of Lexington Hills, California · 17735 days ago · 12 km deep · 91 km away
  40. 1.83 km ESE of Lexington Hills, California · 17735 days ago · 11 km deep · 91 km away
  41. 2.624 km NE of Greenfield, California · 17734 days ago · 2 km deep · 18 km away
  42. 1.724 km NE of Greenfield, California · 17734 days ago · 5 km deep · 19 km away
  43. 1.916 km NW of Parkfield, California · 17734 days ago · 4 km deep · 87 km away
  44. 2.115 km E of Seven Trees, California · 17734 days ago · 6 km deep · 88 km away
  45. 2.824 km NE of Greenfield, California · 17732 days ago · 3 km deep · 19 km away
  46. 1.724 km NE of Greenfield, California · 17732 days ago · 3 km deep · 19 km away
  47. 2.16 km NE of Ridgemark, California · 17731 days ago · 6 km deep · 32 km away
  48. 1.925 km ENE of Greenfield, California · 17731 days ago · 6 km deep · 25 km away
  49. 1.724 km NE of Greenfield, California · 17728 days ago · 5 km deep · 19 km away
  50. 2.021 km NW of Parkfield, California · 17727 days ago · 4 km deep · 82 km away
  51. 2.06 km SE of Tres Pinos, California · 17725 days ago · 10 km deep · 19 km away
  52. 1.92 km NW of Diablo Grande, California · 17724 days ago · 0 km deep · 92 km away
  53. 1.822 km NNE of Soledad, California · 17724 days ago · 5 km deep · 1 km away
  54. 1.924 km NE of Greenfield, California · 17724 days ago · 5 km deep · 20 km away
  55. 2.85 km SW of Gilroy, California · 17723 days ago · 4 km deep · 56 km away
  56. 1.717 km NW of Parkfield, California · 17722 days ago · 4 km deep · 85 km away
  57. 1.722 km NW of Parkfield, California · 17721 days ago · 2 km deep · 80 km away
  58. 1.816 km E of Seven Trees, California · 17720 days ago · 6 km deep · 88 km away
  59. 1.618 km E of East Foothills, California · 17720 days ago · 5 km deep · 93 km away
  60. 2.54 km SE of Aromas, California · 17720 days ago · 8 km deep · 47 km away

The first 60 of 103.

Before

  1. 1.84 km N of Morgan Hill, California · 17754 days ago · 5 km deep · 76 km away
  2. 2.44 km N of Morgan Hill, California · 17754 days ago · 6 km deep · 76 km away
  3. 1.71 km W of Cambrian Park, California · 17755 days ago · 8 km deep · 100 km away
  4. 2.2Central California · 17755 days ago · 10 km deep · 84 km away
  5. 1.6Northern California · 17756 days ago · 5 km deep · 56 km away
  6. 1.624 km NE of Greenfield, California · 17756 days ago · 7 km deep · 17 km away
  7. 1.55 km SW of Ridgemark, California · 17756 days ago · 9 km deep · 29 km away
  8. 3.016 km SSE of Tres Pinos, California · 17756 days ago · 3 km deep · 9 km away
  9. 1.510 km NNW of Hollister, California · 17757 days ago · 7 km deep · 45 km away
  10. 1.712 km NW of Parkfield, California · 17757 days ago · 9 km deep · 90 km away
  11. 2.320 km SSE of Tres Pinos, California · 17757 days ago · 5 km deep · 4 km away
  12. 2.312 km N of Morgan Hill, California · 17758 days ago · 4 km deep · 83 km away
  13. 2.315 km E of Seven Trees, California · 17759 days ago · 4 km deep · 88 km away
  14. 2.425 km WSW of Coalinga, California · 17759 days ago · 2 km deep · 77 km away
  15. 1.825 km NE of King City, California · 17759 days ago · 2 km deep · 30 km away
  16. 1.75 km NW of Parkfield, California · 17760 days ago · 5 km deep · 98 km away
  17. 1.629 km ENE of Soledad, California · 17761 days ago · 9 km deep · 15 km away
  18. 1.612 km N of Morgan Hill, California · 17761 days ago · 3 km deep · 83 km away
  19. 1.85 km SW of Gilroy, California · 17762 days ago · 3 km deep · 56 km away
  20. 1.620 km SSE of Tres Pinos, California · 17765 days ago · 5 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1039044. Read Thu, Oct 1, 2026, 11:31 AM UTC.