California earthquakes

M2.5 earthquake 6 km ESE of Fremont, California

A magnitude 2.5 earthquake struck 6 km ESE of Fremont, California on Sun, Feb 18, 1979, 9:31 AM PST (17:31 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M3.5 12 km E of Blackhawk, California. This one was a foreshock.

Fremont 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
2.5 (md), micro
Local time
UTC
1979-02-18 17:31:16 UTC
Depth
7.4 km (4.6 mi), shallow
Epicenter
37.534° N, 121.915° 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, 0.9 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
47°
Stations used
44

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 51 in the 60 days after this one and 47 in the 30 days before it.

After

  1. 2.94 km SE of Concord, California · 17390 days ago · 13 km deep · 47 km away
  2. 2.32 km SE of Concord, California · 17390 days ago · 13 km deep · 48 km away
  3. 2.14 km SE of Concord, California · 17390 days ago · 12 km deep · 47 km away
  4. 1.89 km NNW of Hollister, California · 17389 days ago · 7 km deep · 79 km away
  5. 1.58 km NNE of Milpitas, California · 17389 days ago · 3 km deep · 6 km away
  6. 3.512 km E of Blackhawk, California · 17387 days ago · 9 km deep · 35 km away
  7. 3.0Northern California · 17387 days ago · 15 km deep · 36 km away
  8. 1.820 km W of Volta, California · 17386 days ago · 3 km deep · 82 km away
  9. 1.77 km ESE of Sunol, California · 17384 days ago · 10 km deep · 9 km away
  10. 1.93 km S of Hollister, California · 17384 days ago · 7 km deep · 91 km away
  11. 2.34 km SSE of Pittsburg, California · 17383 days ago · 16 km deep · 51 km away
  12. 1.75 km NE of Lexington Hills, California · 17381 days ago · 9 km deep · 38 km away
  13. 1.63 km S of Hollister, California · 17381 days ago · 7 km deep · 91 km away
  14. 2.73 km ESE of Pacifica, California · 17381 days ago · 12 km deep · 48 km away
  15. 2.59 km NW of Broadmoor, California · 17380 days ago · 10 km deep · 62 km away
  16. 2.57 km N of Interlaken, California · 17375 days ago · 9 km deep · 60 km away
  17. 2.18 km SE of Seven Trees, California · 17372 days ago · 3 km deep · 35 km away
  18. 3.214 km SE of Livermore, California · 17368 days ago · 8 km deep · 22 km away
  19. 1.79 km S of Pescadero, California · 17368 days ago · 12 km deep · 57 km away
  20. 2.414 km SE of Livermore, California · 17368 days ago · 7 km deep · 21 km away
  21. 1.6Central California · 17366 days ago · 7 km deep · 80 km away
  22. 2.016 km SSE of Diablo Grande, California · 17366 days ago · 2 km deep · 69 km away
  23. 1.55 km SSE of Moskowite Corner, California · 17366 days ago · 5 km deep · 99 km away
  24. 1.85 km WSW of Gilroy, California · 17364 days ago · 5 km deep · 67 km away
  25. 2.31 km NW of Pleasant Hill, California · 17361 days ago · 9 km deep · 49 km away
  26. 2.88 km ENE of San Martin, California · 17359 days ago · 8 km deep · 58 km away
  27. 1.61 km SSE of Blackhawk, California · 17358 days ago · 1 km deep · 30 km away
  28. 2.44 km SE of North Gate, California · 17356 days ago · 12 km deep · 39 km away
  29. 1.78 km SE of Seven Trees, California · 17355 days ago · 5 km deep · 36 km away
  30. 1.83 km SE of Piedmont, California · 17354 days ago · 11 km deep · 39 km away
  31. 2.12 km ESE of Cupertino, California · 17353 days ago · 13 km deep · 26 km away
  32. 2.215 km N of Morgan Hill, California · 17350 days ago · 2 km deep · 37 km away
  33. 2.34 km E of Sunol, California · 17347 days ago · 7 km deep · 10 km away
  34. 3.010 km WSW of Ridgemark, California · 17345 days ago · 8 km deep · 94 km away
  35. 1.79 km WSW of Ridgemark, California · 17345 days ago · 7 km deep · 94 km away
  36. 1.98 km WNW of Broadmoor, California · 17344 days ago · 7 km deep · 61 km away
  37. 1.65 km S of Gilroy, California · 17344 days ago · 3 km deep · 71 km away
  38. 1.81 km ENE of Visitacion Valley, California · 17344 days ago · 4 km deep · 46 km away
  39. 1.87 km NNE of Hollister, California · 17344 days ago · 7 km deep · 83 km away
  40. 2.410 km WSW of Ridgemark, California · 17343 days ago · 6 km deep · 95 km away
  41. 1.513 km N of Morgan Hill, California · 17343 days ago · 5 km deep · 39 km away
  42. 1.98 km NE of Milpitas, California · 17343 days ago · 7 km deep · 10 km away
  43. 2.46 km ENE of Vallejo, California · 17340 days ago · 0 km deep · 69 km away
  44. 1.84 km SE of Highlands-Baywood Park, California · 17337 days ago · 15 km deep · 36 km away
  45. 2.77 km SSE of Livermore, California · 17337 days ago · 5 km deep · 19 km away
  46. 2.27 km SSE of Livermore, California · 17337 days ago · 6 km deep · 19 km away
  47. 2.13 km NE of Interlaken, California · 17334 days ago · 11 km deep · 65 km away
  48. 2.19 km SW of San Martin, California · 17334 days ago · 2 km deep · 59 km away
  49. 2.69 km ESE of East Foothills, California · 17332 days ago · 6 km deep · 27 km away
  50. 1.71 km NW of Concord, California · 17332 days ago · 15 km deep · 51 km away
  51. 2.06 km NNE of East Foothills, California · 17331 days ago · 6 km deep · 16 km away

Before

  1. 2.14 km SW of Ridgemark, California · 17390 days ago · 9 km deep · 95 km away
  2. 2.75 km SW of Gilroy, California · 17390 days ago · 4 km deep · 68 km away
  3. 2.58 km NNE of Morgan Hill, California · 17391 days ago · 5 km deep · 45 km away
  4. 2.95 km S of Gilroy, California · 17391 days ago · 7 km deep · 71 km away
  5. 2.015 km SSW of Santa Cruz, California · 17391 days ago · 5 km deep · 78 km away
  6. 1.78 km ENE of Morgan Hill, California · 17392 days ago · 3 km deep · 50 km away
  7. 2.01 km S of Milpitas, California · 17392 days ago · 2 km deep · 13 km away
  8. 2.07 km E of Gilroy, California · 17393 days ago · 4 km deep · 70 km away
  9. 2.07 km E of Gilroy, California · 17393 days ago · 5 km deep · 70 km away
  10. 1.96 km SSW of Livermore, California · 17393 days ago · 6 km deep · 15 km away
  11. 1.75 km S of Gilroy, California · 17394 days ago · 6 km deep · 71 km away
  12. 1.811 km ESE of East Foothills, California · 17394 days ago · 8 km deep · 29 km away
  13. 2.13 km NW of Diablo, California · 17394 days ago · 15 km deep · 36 km away
  14. 2.55 km S of Gilroy, California · 17395 days ago · 6 km deep · 71 km away
  15. 2.54 km SSW of Gilroy, California · 17398 days ago · 7 km deep · 69 km away
  16. 1.92 km NE of Danville, California · 17398 days ago · 8 km deep · 34 km away
  17. 1.76 km NE of East Foothills, California · 17399 days ago · 8 km deep · 18 km away
  18. 1.87 km NNE of East Foothills, California · 17401 days ago · 6 km deep · 14 km away
  19. 1.85 km SW of Gilroy, California · 17402 days ago · 6 km deep · 68 km away
  20. 2.110 km WSW of Ridgemark, California · 17402 days ago · 7 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1044713. Read Tue, Sep 29, 2026, 6:56 PM UTC.