California earthquakes

M2.4 earthquake 6 km ENE of Seven Trees, California

A magnitude 2.4 earthquake struck 6 km ENE of Seven Trees, California on Thu, Aug 31, 1978, 1:25 PM PDT (20:25 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.2 37km SSW of Half Moon Bay, CA. This one was a foreshock.

Seven Trees 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
2.4 (md), micro
Local time
UTC
1978-08-31 20:25:14 UTC
Depth
4.5 km (2.8 mi), shallow
Epicenter
37.316° N, 121.779° 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, 0.4 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
59°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 137 in the 60 days after this one and 71 in the 30 days before it.

After

  1. 2.46 km ENE of Seven Trees, California · 17560 days ago · 6 km deep · 0 km away
  2. 3.36 km ENE of Seven Trees, California · 17560 days ago · 5 km deep · 0 km away
  3. 1.713 km E of Seven Trees, California · 17559 days ago · 1 km deep · 9 km away
  4. 1.87 km NE of Interlaken, California · 17559 days ago · 4 km deep · 36 km away
  5. 1.915 km SW of Los Banos, California · 17559 days ago · 6 km deep · 81 km away
  6. 1.92 km ENE of Ridgemark, California · 17557 days ago · 6 km deep · 67 km away
  7. 1.621 km NE of Soledad, California · 17557 days ago · 0 km deep · 96 km away
  8. 1.79 km ESE of Gilroy, California · 17556 days ago · 4 km deep · 47 km away
  9. 2.66 km ENE of Seven Trees, California · 17556 days ago · 5 km deep · 0 km away
  10. 2.59 km SSE of Tres Pinos, California · 17554 days ago · 5 km deep · 80 km away
  11. 1.86 km NE of Ridgemark, California · 17554 days ago · 5 km deep · 65 km away
  12. 1.81 km SE of East Foothills, California · 17553 days ago · 5 km deep · 6 km away
  13. 1.63 km NE of Tres Pinos, California · 17553 days ago · 8 km deep · 70 km away
  14. 2.35 km ENE of Aromas, California · 17552 days ago · 8 km deep · 48 km away
  15. 2.310 km S of Tres Pinos, California · 17551 days ago · 3 km deep · 79 km away
  16. 3.410 km S of Tres Pinos, California · 17551 days ago · 4 km deep · 79 km away
  17. 2.46 km ENE of Seven Trees, California · 17551 days ago · 5 km deep · 0 km away
  18. 1.610 km S of Tres Pinos, California · 17551 days ago · 3 km deep · 80 km away
  19. 2.26 km E of East Foothills, California · 17550 days ago · 7 km deep · 8 km away
  20. 1.510 km S of Tres Pinos, California · 17547 days ago · 3 km deep · 79 km away
  21. 3.210 km S of Tres Pinos, California · 17546 days ago · 4 km deep · 79 km away
  22. 1.99 km S of Tres Pinos, California · 17546 days ago · 4 km deep · 79 km away
  23. 2.19 km S of Tres Pinos, California · 17546 days ago · 3 km deep · 79 km away
  24. 1.79 km S of Tres Pinos, California · 17546 days ago · 4 km deep · 79 km away
  25. 1.89 km S of Tres Pinos, California · 17546 days ago · 4 km deep · 79 km away
  26. 2.36 km E of East Foothills, California · 17546 days ago · 7 km deep · 8 km away
  27. 2.25 km SE of Alum Rock, California · 17545 days ago · 3 km deep · 2 km away
  28. 2.36 km NE of Ridgemark, California · 17545 days ago · 6 km deep · 67 km away
  29. 1.75 km SSE of San Juan Bautista, California · 17545 days ago · 5 km deep · 62 km away
  30. 1.89 km S of Tres Pinos, California · 17545 days ago · 4 km deep · 79 km away
  31. 3.39 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 79 km away
  32. 3.010 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 79 km away
  33. 2.410 km S of Tres Pinos, California · 17544 days ago · 5 km deep · 79 km away
  34. 1.610 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 79 km away
  35. 2.910 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 80 km away
  36. 4.237km SSW of Half Moon Bay, CA · 17544 days ago · 6 km deep · 72 km away
  37. 3.910 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 80 km away
  38. 2.810 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 80 km away
  39. 1.69 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 79 km away
  40. 3.810 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 79 km away
  41. 2.2Central California · 17544 days ago · 4 km deep · 79 km away
  42. 2.410 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 80 km away
  43. 2.710 km S of Tres Pinos, California · 17544 days ago · 5 km deep · 79 km away
  44. 2.210 km S of Tres Pinos, California · 17544 days ago · 4 km deep · 80 km away
  45. 1.8Central California · 17544 days ago · 4 km deep · 80 km away
  46. 2.3Central California · 17544 days ago · 4 km deep · 80 km away
  47. 2.710 km S of Tres Pinos, California · 17543 days ago · 4 km deep · 80 km away
  48. 2.9Central California · 17543 days ago · 5 km deep · 80 km away
  49. 2.010 km S of Tres Pinos, California · 17543 days ago · 4 km deep · 79 km away
  50. 3.0Central California · 17543 days ago · 4 km deep · 79 km away
  51. 2.011 km S of Tres Pinos, California · 17543 days ago · 4 km deep · 81 km away
  52. 2.88 km NW of Broadmoor, California · 17542 days ago · 6 km deep · 83 km away
  53. 2.39 km NE of San Martin, California · 17542 days ago · 7 km deep · 27 km away
  54. 1.610 km SSW of Tres Pinos, California · 17542 days ago · 12 km deep · 78 km away
  55. 1.817 km SSE of Tres Pinos, California · 17541 days ago · 8 km deep · 89 km away
  56. 2.19 km S of Tres Pinos, California · 17541 days ago · 4 km deep · 79 km away
  57. 2.38 km SSE of Tres Pinos, California · 17541 days ago · 5 km deep · 79 km away
  58. 3.28 km NE of Interlaken, California · 17541 days ago · 4 km deep · 36 km away
  59. 1.69 km SSE of Tres Pinos, California · 17541 days ago · 5 km deep · 80 km away
  60. 1.88 km NE of Interlaken, California · 17541 days ago · 4 km deep · 36 km away

The first 60 of 137.

Before

  1. 2.02 km N of San Ramon, California · 17561 days ago · 8 km deep · 57 km away
  2. 1.710 km ESE of East Foothills, California · 17562 days ago · 7 km deep · 7 km away
  3. 1.716 km NE of East Foothills, California · 17562 days ago · 6 km deep · 21 km away
  4. 2.0Central California · 17562 days ago · 2 km deep · 94 km away
  5. 2.415 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 86 km away
  6. 2.216 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 87 km away
  7. 2.016 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 87 km away
  8. 1.816 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 87 km away
  9. 2.616 km SSE of Tres Pinos, California · 17563 days ago · 6 km deep · 87 km away
  10. 1.510 km ESE of East Foothills, California · 17563 days ago · 8 km deep · 7 km away
  11. 2.410 km ESE of East Foothills, California · 17563 days ago · 8 km deep · 7 km away
  12. 2.010 km ESE of East Foothills, California · 17563 days ago · 8 km deep · 7 km away
  13. 1.610 km ESE of East Foothills, California · 17564 days ago · 7 km deep · 7 km away
  14. 1.810 km ESE of East Foothills, California · 17564 days ago · 7 km deep · 7 km away
  15. 2.110 km ESE of East Foothills, California · 17564 days ago · 7 km deep · 7 km away
  16. 1.510 km ESE of East Foothills, California · 17564 days ago · 8 km deep · 7 km away
  17. 2.59 km ESE of East Foothills, California · 17564 days ago · 5 km deep · 7 km away
  18. 2.69 km ESE of East Foothills, California · 17564 days ago · 8 km deep · 7 km away
  19. 2.210 km ESE of East Foothills, California · 17564 days ago · 7 km deep · 7 km away
  20. 1.59 km ESE of East Foothills, California · 17564 days ago · 7 km deep · 6 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1042003. Read Tue, Sep 29, 2026, 6:50 PM UTC.