California earthquakes

M2.1 earthquake 6 km S of Sunol, California

A magnitude 2.1 earthquake struck 6 km S of Sunol, California on Sun, Mar 5, 1978, 6:36 AM PST (14:36 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.3 7 km SE of Alum Rock, California. This one was a foreshock.

Sunol 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
2.1 (md), micro
Local time
UTC
1978-03-05 14:36:18 UTC
Depth
8.3 km (5.1 mi), shallow
Epicenter
37.533° N, 121.902° 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, 0.5 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
46°
Stations used
34

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 69 in the 60 days after this one and 39 in the 30 days before it.

After

  1. 1.83 km NNE of Dublin, California · 17732 days ago · 8 km deep · 23 km away
  2. 1.88 km SSE of San Juan Bautista, California · 17732 days ago · 7 km deep · 91 km away
  3. 1.63 km NNE of Dublin, California · 17732 days ago · 8 km deep · 22 km away
  4. 1.74 km NNE of Dublin, California · 17730 days ago · 8 km deep · 23 km away
  5. 1.93 km NNE of Dublin, California · 17730 days ago · 8 km deep · 23 km away
  6. 2.0Northern California · 17730 days ago · 6 km deep · 22 km away
  7. 2.37 km SE of Alum Rock, California · 17728 days ago · 3 km deep · 26 km away
  8. 1.64 km SW of Ridgemark, California · 17728 days ago · 7 km deep · 94 km away
  9. 2.57 km NE of Interlaken, California · 17727 days ago · 11 km deep · 63 km away
  10. 2.21 km SE of Highlands-Baywood Park, California · 17727 days ago · 5 km deep · 38 km away
  11. 2.43 km ESE of Lexington Hills, California · 17726 days ago · 12 km deep · 42 km away
  12. 2.010 km ESE of Sunol, California · 17726 days ago · 7 km deep · 11 km away
  13. 1.83 km ESE of Lexington Hills, California · 17726 days ago · 11 km deep · 42 km away
  14. 2.115 km E of Seven Trees, California · 17725 days ago · 6 km deep · 35 km away
  15. 2.321 km NW of Diablo Grande, California · 17724 days ago · 4 km deep · 38 km away
  16. 1.63 km WSW of Dublin, California · 17724 days ago · 6 km deep · 18 km away
  17. 2.53 km S of Diablo, California · 17724 days ago · 8 km deep · 31 km away
  18. 2.16 km NE of Ridgemark, California · 17722 days ago · 6 km deep · 91 km away
  19. 2.69 km SE of Sunol, California · 17721 days ago · 2 km deep · 7 km away
  20. 1.83 km SW of Loyola, California · 17720 days ago · 5 km deep · 30 km away
  21. 1.81 km N of Pittsburg, California · 17719 days ago · 17 km deep · 57 km away
  22. 1.92 km NW of Diablo Grande, California · 17715 days ago · 0 km deep · 55 km away
  23. 2.85 km SW of Gilroy, California · 17714 days ago · 4 km deep · 67 km away
  24. 1.816 km E of Seven Trees, California · 17711 days ago · 6 km deep · 35 km away
  25. 1.618 km E of East Foothills, California · 17711 days ago · 5 km deep · 32 km away
  26. 2.54 km SE of Aromas, California · 17711 days ago · 8 km deep · 79 km away
  27. 1.68 km SE of Sunol, California · 17711 days ago · 3 km deep · 7 km away
  28. 2.16 km NNE of Ridgemark, California · 17711 days ago · 6 km deep · 90 km away
  29. 3.04 km SE of Aromas, California · 17711 days ago · 8 km deep · 79 km away
  30. 1.65 km WNW of San Juan Bautista, California · 17711 days ago · 7 km deep · 80 km away
  31. 2.84 km SE of Aromas, California · 17711 days ago · 8 km deep · 79 km away
  32. 2.75 km WNW of San Juan Bautista, California · 17710 days ago · 8 km deep · 80 km away
  33. 2.01 km WNW of Cambrian Park, California · 17710 days ago · 8 km deep · 30 km away
  34. 2.01 km WNW of Cambrian Park, California · 17709 days ago · 8 km deep · 31 km away
  35. 2.54 km ESE of Piedmont, California · 17709 days ago · 9 km deep · 39 km away
  36. 1.62 km S of Fairview, California · 17709 days ago · 6 km deep · 18 km away
  37. 2.12 km ENE of Berkeley, California · 17709 days ago · 9 km deep · 49 km away
  38. 1.92 km ENE of Berkeley, California · 17709 days ago · 9 km deep · 49 km away
  39. 1.56 km E of Hollister, California · 17708 days ago · 5 km deep · 90 km away
  40. 1.57 km NE of Blackhawk, California · 17707 days ago · 12 km deep · 38 km away
  41. 1.610 km NNE of San Juan Bautista, California · 17705 days ago · 0 km deep · 77 km away
  42. 1.85 km ESE of Knightsen, California · 17705 days ago · 0 km deep · 54 km away
  43. 1.8Northern California · 17704 days ago · 5 km deep · 36 km away
  44. 2.71 km NNW of Alamo, California · 17704 days ago · 9 km deep · 39 km away
  45. 2.31 km NNW of Alamo, California · 17704 days ago · 8 km deep · 39 km away
  46. 2.01 km NNW of Alamo, California · 17704 days ago · 10 km deep · 39 km away
  47. 1.69 km ENE of Gilroy, California · 17701 days ago · 8 km deep · 66 km away
  48. 2.79 km SSE of San Juan Bautista, California · 17700 days ago · 6 km deep · 93 km away
  49. 2.86 km ESE of Sunol, California · 17700 days ago · 11 km deep · 9 km away
  50. 2.210 km SE of San Juan Bautista, California · 17700 days ago · 6 km deep · 93 km away
  51. 2.119 km W of Volta, California · 17699 days ago · 0 km deep · 82 km away
  52. 2.29 km NW of Hollister, California · 17699 days ago · 6 km deep · 78 km away
  53. 2.015 km E of Seven Trees, California · 17698 days ago · 3 km deep · 34 km away
  54. 1.51 km SSW of Fairview, California · 17697 days ago · 5 km deep · 20 km away
  55. 1.65 km E of Fremont, California · 17697 days ago · 7 km deep · 2 km away
  56. 2.35 km NNE of Tres Pinos, California · 17695 days ago · 4 km deep · 94 km away
  57. 1.717 km E of East Foothills, California · 17694 days ago · 6 km deep · 32 km away
  58. 3.19 km SSE of San Juan Bautista, California · 17693 days ago · 8 km deep · 93 km away
  59. 2.42 km NW of Concord, California · 17691 days ago · 16 km deep · 53 km away
  60. 1.910 km SE of San Juan Bautista, California · 17690 days ago · 6 km deep · 93 km away

The first 60 of 69.

Before

  1. 1.59 km ENE of Milpitas, CA · 17736 days ago · 7 km deep · 10 km away
  2. 2.17 km NE of San Martin, California · 17737 days ago · 1 km deep · 53 km away
  3. 1.71 km N of North Gate, California · 17737 days ago · 10 km deep · 44 km away
  4. 2.31 km NNE of Diablo, California · 17738 days ago · 8 km deep · 35 km away
  5. 2.42 km WSW of San Juan Bautista, California · 17738 days ago · 7 km deep · 83 km away
  6. 1.7Central California · 17739 days ago · 5 km deep · 79 km away
  7. 1.61 km ENE of Hollister, California · 17741 days ago · 8 km deep · 88 km away
  8. 2.51 km NE of Hollister, California · 17741 days ago · 8 km deep · 87 km away
  9. 1.6Northern California · 17741 days ago · 2 km deep · 33 km away
  10. 2.78 km SSE of San Juan Bautista, California · 17742 days ago · 7 km deep · 91 km away
  11. 2.216 km N of Morgan Hill, California · 17743 days ago · 6 km deep · 36 km away
  12. 2.27 km S of Livermore, California · 17745 days ago · 8 km deep · 15 km away
  13. 1.84 km N of Morgan Hill, California · 17745 days ago · 5 km deep · 46 km away
  14. 2.44 km N of Morgan Hill, California · 17745 days ago · 6 km deep · 46 km away
  15. 1.71 km W of Cambrian Park, California · 17746 days ago · 8 km deep · 31 km away
  16. 2.62 km S of Blackhawk, California · 17747 days ago · 8 km deep · 30 km away
  17. 1.6Northern California · 17747 days ago · 5 km deep · 66 km away
  18. 1.55 km SW of Ridgemark, California · 17748 days ago · 9 km deep · 94 km away
  19. 1.510 km NNW of Hollister, California · 17748 days ago · 7 km deep · 77 km away
  20. 2.312 km N of Morgan Hill, California · 17749 days ago · 4 km deep · 40 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1039161. Read Tue, Sep 22, 2026, 9:38 PM UTC.