California earthquakes

M2.7 earthquake 3 km ESE of Pacifica, California

A magnitude 2.7 earthquake struck 3 km ESE of Pacifica, California on Tue, Feb 27, 1979, 5:03 PM PST (01:03 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M4.4 2 km N of Pacifica, California. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.7 (md), micro
Local time
UTC
1979-02-28 01:03:01 UTC
Depth
12.4 km (7.7 mi), shallow
Epicenter
37.603° N, 122.448° 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
±0.06
Depth from
From location
Station coverage gap
95°
Stations used
33

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 37 in the 60 days after this one and 27 in the 30 days before it.

After

  1. 2.59 km NW of Broadmoor, California · 17378 days ago · 10 km deep · 19 km away
  2. 2.57 km N of Interlaken, California · 17373 days ago · 9 km deep · 91 km away
  3. 2.18 km SE of Seven Trees, California · 17369 days ago · 3 km deep · 72 km away
  4. 3.214 km SE of Livermore, California · 17366 days ago · 8 km deep · 69 km away
  5. 1.79 km S of Pescadero, California · 17366 days ago · 12 km deep · 48 km away
  6. 2.414 km SE of Livermore, California · 17366 days ago · 7 km deep · 68 km away
  7. 1.55 km SSE of Moskowite Corner, California · 17364 days ago · 5 km deep · 92 km away
  8. 2.31 km NW of Pleasant Hill, California · 17359 days ago · 9 km deep · 52 km away
  9. 2.88 km ENE of San Martin, California · 17357 days ago · 8 km deep · 98 km away
  10. 1.61 km SSE of Blackhawk, California · 17356 days ago · 1 km deep · 53 km away
  11. 2.44 km SE of North Gate, California · 17354 days ago · 12 km deep · 53 km away
  12. 1.85 km SE of Santa Rosa, California · 17353 days ago · 10 km deep · 92 km away
  13. 1.78 km SE of Seven Trees, California · 17353 days ago · 5 km deep · 73 km away
  14. 1.83 km SE of Piedmont, California · 17352 days ago · 11 km deep · 30 km away
  15. 2.12 km ESE of Cupertino, California · 17351 days ago · 13 km deep · 51 km away
  16. 2.215 km N of Morgan Hill, California · 17348 days ago · 2 km deep · 79 km away
  17. 2.34 km E of Sunol, California · 17345 days ago · 7 km deep · 54 km away
  18. 1.98 km WNW of Broadmoor, California · 17342 days ago · 7 km deep · 16 km away
  19. 1.81 km ENE of Visitacion Valley, California · 17342 days ago · 4 km deep · 14 km away
  20. 1.513 km N of Morgan Hill, California · 17341 days ago · 5 km deep · 81 km away
  21. 1.98 km NE of Milpitas, California · 17341 days ago · 7 km deep · 56 km away
  22. 2.46 km ENE of Vallejo, California · 17338 days ago · 0 km deep · 62 km away
  23. 1.84 km SE of Highlands-Baywood Park, California · 17335 days ago · 15 km deep · 17 km away
  24. 2.77 km SSE of Livermore, California · 17335 days ago · 5 km deep · 63 km away
  25. 2.27 km SSE of Livermore, California · 17334 days ago · 6 km deep · 63 km away
  26. 2.13 km NE of Interlaken, California · 17332 days ago · 11 km deep · 96 km away
  27. 2.19 km SW of San Martin, California · 17332 days ago · 2 km deep · 91 km away
  28. 2.69 km ESE of East Foothills, California · 17330 days ago · 6 km deep · 70 km away
  29. 1.71 km NW of Concord, California · 17330 days ago · 15 km deep · 56 km away
  30. 2.06 km NNE of East Foothills, California · 17329 days ago · 6 km deep · 61 km away
  31. 2.314 km E of Seven Trees, California · 17327 days ago · 6 km deep · 76 km away
  32. 2.714 km N of Morgan Hill, California · 17324 days ago · 6 km deep · 81 km away
  33. 2.03 km W of Antioch, California · 17322 days ago · 17 km deep · 69 km away
  34. 1.814 km N of Morgan Hill, California · 17320 days ago · 6 km deep · 81 km away
  35. 1.93 km SW of Colma, California · 17320 days ago · 13 km deep · 6 km away
  36. 4.42 km N of Pacifica, California · 17320 days ago · 15 km deep · 5 km away
  37. 3.73 km SSW of Colma, California · 17320 days ago · 10 km deep · 6 km away

Before

  1. 1.75 km NE of Lexington Hills, California · 17379 days ago · 9 km deep · 65 km away
  2. 2.34 km SSE of Pittsburg, California · 17381 days ago · 16 km deep · 67 km away
  3. 1.77 km ESE of Sunol, California · 17382 days ago · 10 km deep · 56 km away
  4. 3.0Northern California · 17385 days ago · 15 km deep · 65 km away
  5. 3.512 km E of Blackhawk, California · 17385 days ago · 9 km deep · 65 km away
  6. 1.58 km NNE of Milpitas, California · 17386 days ago · 3 km deep · 52 km away
  7. 2.14 km SE of Concord, California · 17388 days ago · 12 km deep · 55 km away
  8. 2.32 km SE of Concord, California · 17388 days ago · 13 km deep · 55 km away
  9. 2.94 km SE of Concord, California · 17388 days ago · 13 km deep · 55 km away
  10. 2.56 km ESE of Fremont, California · 17388 days ago · 7 km deep · 48 km away
  11. 2.58 km NNE of Morgan Hill, California · 17389 days ago · 5 km deep · 85 km away
  12. 2.015 km SSW of Santa Cruz, California · 17389 days ago · 5 km deep · 89 km away
  13. 1.78 km ENE of Morgan Hill, California · 17390 days ago · 3 km deep · 91 km away
  14. 2.01 km S of Milpitas, California · 17390 days ago · 2 km deep · 52 km away
  15. 1.96 km SSW of Livermore, California · 17391 days ago · 6 km deep · 57 km away
  16. 1.811 km ESE of East Foothills, California · 17392 days ago · 8 km deep · 72 km away
  17. 2.13 km NW of Diablo, California · 17392 days ago · 15 km deep · 49 km away
  18. 3.957km W of Bonny Doon, CA · 17394 days ago · 6 km deep · 79 km away
  19. 1.92 km NE of Danville, California · 17396 days ago · 8 km deep · 48 km away
  20. 1.76 km NE of East Foothills, California · 17397 days ago · 8 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1044826. Read Sun, Sep 27, 2026, 5:37 PM UTC.