California earthquakes

M2.1 earthquake 2 km ESE of Cupertino, California

A magnitude 2.1 earthquake struck 2 km ESE of Cupertino, California on Tue, Mar 27, 1979, 9:12 PM PST (05:12 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M4.8 15 km E of Seven Trees, California. This one was a foreshock.

Cupertino 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1979-03-28 05:12:48 UTC
Depth
13.5 km (8.4 mi), shallow
Epicenter
37.310° N, 122.004° 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
±0.09
Depth from
From location
Station coverage gap
34°
Stations used
51

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 88 in the 60 days after this one and 26 in the 30 days before it.

After

  1. 2.215 km N of Morgan Hill, California · 17355 days ago · 2 km deep · 31 km away
  2. 2.34 km E of Sunol, California · 17353 days ago · 7 km deep · 35 km away
  3. 3.010 km WSW of Ridgemark, California · 17351 days ago · 8 km deep · 77 km away
  4. 1.79 km WSW of Ridgemark, California · 17351 days ago · 7 km deep · 77 km away
  5. 1.98 km WNW of Broadmoor, California · 17350 days ago · 7 km deep · 67 km away
  6. 1.65 km S of Gilroy, California · 17350 days ago · 3 km deep · 54 km away
  7. 1.81 km ENE of Visitacion Valley, California · 17350 days ago · 4 km deep · 57 km away
  8. 1.87 km NNE of Hollister, California · 17350 days ago · 7 km deep · 70 km away
  9. 2.410 km WSW of Ridgemark, California · 17349 days ago · 6 km deep · 78 km away
  10. 1.513 km N of Morgan Hill, California · 17349 days ago · 5 km deep · 32 km away
  11. 1.98 km NE of Milpitas, California · 17349 days ago · 7 km deep · 24 km away
  12. 2.410 km S of Tres Pinos, California · 17348 days ago · 4 km deep · 90 km away
  13. 2.46 km ENE of Vallejo, California · 17345 days ago · 0 km deep · 91 km away
  14. 1.84 km SE of Highlands-Baywood Park, California · 17343 days ago · 15 km deep · 34 km away
  15. 2.08 km SW of Tres Pinos, California · 17342 days ago · 2 km deep · 85 km away
  16. 2.77 km SSE of Livermore, California · 17342 days ago · 5 km deep · 42 km away
  17. 2.27 km SSE of Livermore, California · 17342 days ago · 6 km deep · 42 km away
  18. 2.13 km NE of Interlaken, California · 17340 days ago · 11 km deep · 46 km away
  19. 2.19 km SW of San Martin, California · 17340 days ago · 2 km deep · 41 km away
  20. 2.69 km ESE of East Foothills, California · 17338 days ago · 6 km deep · 26 km away
  21. 1.71 km NW of Concord, California · 17338 days ago · 15 km deep · 75 km away
  22. 2.06 km NNE of East Foothills, California · 17337 days ago · 6 km deep · 24 km away
  23. 1.95 km ESE of Aromas, California · 17336 days ago · 5 km deep · 62 km away
  24. 1.711 km S of Tres Pinos, California · 17336 days ago · 5 km deep · 92 km away
  25. 2.1Central California · 17335 days ago · 4 km deep · 85 km away
  26. 2.314 km E of Seven Trees, California · 17335 days ago · 6 km deep · 29 km away
  27. 1.85 km SSW of Tres Pinos, California · 17334 days ago · 4 km deep · 85 km away
  28. 3.1Central California · 17333 days ago · 8 km deep · 76 km away
  29. 1.54 km S of Ridgemark, California · 17333 days ago · 3 km deep · 82 km away
  30. 2.04 km WNW of San Juan Bautista, California · 17333 days ago · 6 km deep · 62 km away
  31. 2.714 km N of Morgan Hill, California · 17332 days ago · 6 km deep · 32 km away
  32. 1.83 km S of Tres Pinos, California · 17331 days ago · 5 km deep · 86 km away
  33. 2.03 km W of Antioch, California · 17330 days ago · 17 km deep · 78 km away
  34. 1.814 km N of Morgan Hill, California · 17328 days ago · 6 km deep · 33 km away
  35. 1.93 km SW of Colma, California · 17328 days ago · 13 km deep · 57 km away
  36. 1.84 km SSW of Gilroy, California · 17328 days ago · 6 km deep · 54 km away
  37. 2.11 km N of Aromas, California · 17328 days ago · 8 km deep · 56 km away
  38. 4.42 km N of Pacifica, California · 17327 days ago · 15 km deep · 56 km away
  39. 3.73 km SSW of Colma, California · 17327 days ago · 10 km deep · 57 km away
  40. 2.55 km NNW of San Juan Bautista, California · 17326 days ago · 7 km deep · 61 km away
  41. 2.211 km SSE of Livermore, California · 17325 days ago · 5 km deep · 41 km away
  42. 2.411 km SSE of Livermore, California · 17325 days ago · 6 km deep · 42 km away
  43. 2.511 km SSE of Livermore, California · 17325 days ago · 6 km deep · 41 km away
  44. 1.66 km ESE of East Foothills, California · 17324 days ago · 2 km deep · 23 km away
  45. 1.97 km NNE of Interlaken, California · 17321 days ago · 6 km deep · 42 km away
  46. 2.38 km S of Sunol, California · 17320 days ago · 6 km deep · 26 km away
  47. 1.617 km SSE of Tres Pinos, California · 17320 days ago · 5 km deep · 99 km away
  48. 1.95 km NW of Acalanes Ridge, California · 17320 days ago · 16 km deep · 70 km away
  49. 2.0Northern California · 17320 days ago · 9 km deep · 64 km away
  50. 2.0Northern California · 17320 days ago · 9 km deep · 64 km away
  51. 1.8Northern California · 17320 days ago · 9 km deep · 64 km away
  52. 1.82 km WSW of Lafayette, California · 17320 days ago · 10 km deep · 64 km away
  53. 2.56 km NE of East Foothills, California · 17319 days ago · 11 km deep · 25 km away
  54. 1.96 km WSW of Gilroy, California · 17319 days ago · 6 km deep · 50 km away
  55. 1.6Central California · 17318 days ago · 3 km deep · 86 km away
  56. 1.76 km NNE of Interlaken, California · 17318 days ago · 6 km deep · 42 km away
  57. 2.315 km E of Seven Trees, California · 17317 days ago · 7 km deep · 30 km away
  58. 4.815 km E of Seven Trees, California · 17317 days ago · 7 km deep · 30 km away
  59. 2.514 km E of Seven Trees, California · 17317 days ago · 6 km deep · 29 km away
  60. 2.29 km ESE of East Foothills, California · 17317 days ago · 8 km deep · 26 km away

The first 60 of 88.

Before

  1. 1.83 km SE of Piedmont, California · 17359 days ago · 11 km deep · 57 km away
  2. 1.78 km SE of Seven Trees, California · 17361 days ago · 5 km deep · 23 km away
  3. 2.44 km SE of North Gate, California · 17362 days ago · 12 km deep · 64 km away
  4. 1.61 km SSE of Blackhawk, California · 17363 days ago · 1 km deep · 56 km away
  5. 2.88 km ENE of San Martin, California · 17365 days ago · 8 km deep · 48 km away
  6. 2.31 km NW of Pleasant Hill, California · 17367 days ago · 9 km deep · 72 km away
  7. 3.615 km ESE of Tres Pinos, California · 17370 days ago · 11 km deep · 98 km away
  8. 3.216 km SSE of Tres Pinos, California · 17370 days ago · 3 km deep · 98 km away
  9. 1.85 km WSW of Gilroy, California · 17370 days ago · 5 km deep · 50 km away
  10. 1.917 km SSE of Tres Pinos, California · 17370 days ago · 5 km deep · 99 km away
  11. 2.016 km SSE of Diablo Grande, California · 17372 days ago · 2 km deep · 69 km away
  12. 1.6Central California · 17372 days ago · 7 km deep · 65 km away
  13. 2.414 km SE of Livermore, California · 17373 days ago · 7 km deep · 41 km away
  14. 1.79 km S of Pescadero, California · 17374 days ago · 12 km deep · 36 km away
  15. 3.214 km SE of Livermore, California · 17374 days ago · 8 km deep · 42 km away
  16. 2.05 km SSW of Tres Pinos, California · 17375 days ago · 4 km deep · 85 km away
  17. 1.65 km SSW of Tres Pinos, California · 17375 days ago · 4 km deep · 85 km away
  18. 2.18 km SE of Seven Trees, California · 17377 days ago · 3 km deep · 22 km away
  19. 1.615 km SSE of Tres Pinos, California · 17379 days ago · 3 km deep · 97 km away
  20. 2.57 km N of Interlaken, California · 17381 days ago · 9 km deep · 41 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1045180. Read Mon, Oct 5, 2026, 10:34 AM UTC.