California earthquakes

M1.9 earthquake 3 km E of Moraga, California

A magnitude 1.9 earthquake struck 3 km E of Moraga, California on Thu, Dec 14, 1978, 8:51 PM PST (04:51 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.6 5 km E of East Foothills, California. This one was a foreshock.

Moraga 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
1.9 (md), micro
Local time
UTC
1978-12-15 04:51:35 UTC
Depth
2.4 km (1.5 mi), shallow
Epicenter
37.836° N, 122.085° 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, 0.7 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
57°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 79 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 1.711 km ESE of East Foothills, California · 17454 days ago · 7 km deep · 65 km away
  2. 3.34 km ENE of East Foothills, California · 17453 days ago · 2 km deep · 56 km away
  3. 2.14 km N of East Foothills, California · 17451 days ago · 2 km deep · 52 km away
  4. 1.66 km NW of Morgan Hill, California · 17449 days ago · 6 km deep · 81 km away
  5. 1.611 km SE of Sunol, California · 17446 days ago · 3 km deep · 43 km away
  6. 1.68 km N of Interlaken, California · 17445 days ago · 11 km deep · 96 km away
  7. 2.08 km N of Interlaken, California · 17445 days ago · 11 km deep · 96 km away
  8. 2.714 km S of Tracy, California · 17445 days ago · 2 km deep · 65 km away
  9. 1.626 km ENE of East Foothills, California · 17445 days ago · 5 km deep · 60 km away
  10. 2.36 km E of East Foothills, California · 17444 days ago · 6 km deep · 58 km away
  11. 2.114 km E of Seven Trees, California · 17442 days ago · 3 km deep · 71 km away
  12. 1.95 km ESE of Black Point-Green Point, California · 17442 days ago · 5 km deep · 44 km away
  13. 2.23 km W of Deer Park, California · 17441 days ago · 8 km deep · 87 km away
  14. 1.85 km NNE of Morgan Hill, California · 17440 days ago · 7 km deep · 83 km away
  15. 2.48 km N of East Foothills, California · 17439 days ago · 6 km deep · 49 km away
  16. 1.56 km E of East Foothills, California · 17438 days ago · 7 km deep · 58 km away
  17. 1.919 km WSW of Diablo Grande, California · 17437 days ago · 8 km deep · 79 km away
  18. 1.51 km WSW of Moskowite Corner, California · 17437 days ago · 12 km deep · 67 km away
  19. 1.72 km W of Cambrian Park, California · 17436 days ago · 8 km deep · 65 km away
  20. 2.116 km NE of East Foothills, California · 17435 days ago · 6 km deep · 55 km away
  21. 1.84 km WSW of North Richmond, California · 17434 days ago · 8 km deep · 31 km away
  22. 1.95 km E of La Honda, California · 17431 days ago · 8 km deep · 59 km away
  23. 1.614 km E of Seven Trees, California · 17430 days ago · 6 km deep · 69 km away
  24. 2.45 km E of Black Point-Green Point, California · 17430 days ago · 12 km deep · 45 km away
  25. 2.58 km NNE of Interlaken, California · 17428 days ago · 10 km deep · 96 km away
  26. 2.18 km N of Interlaken, California · 17428 days ago · 10 km deep · 96 km away
  27. 3.18 km N of Interlaken, California · 17428 days ago · 10 km deep · 96 km away
  28. 2.38 km N of Interlaken, California · 17428 days ago · 9 km deep · 96 km away
  29. 3.65 km E of East Foothills, California · 17428 days ago · 0 km deep · 59 km away
  30. 2.95 km E of East Foothills, California · 17428 days ago · 0 km deep · 59 km away
  31. 1.95 km E of East Foothills, California · 17428 days ago · 0 km deep · 59 km away
  32. 2.38 km ENE of San Martin, California · 17426 days ago · 8 km deep · 94 km away
  33. 2.11 km WNW of Diablo, California · 17426 days ago · 9 km deep · 10 km away
  34. 1.96 km E of East Foothills, California · 17426 days ago · 1 km deep · 59 km away
  35. 1.82 km W of Cambrian Park, California · 17426 days ago · 7 km deep · 65 km away
  36. 1.82 km WNW of Cambrian Park, California · 17426 days ago · 7 km deep · 65 km away
  37. 1.95 km E of East Foothills, California · 17425 days ago · 0 km deep · 59 km away
  38. 1.76 km E of Sunol, California · 17424 days ago · 9 km deep · 36 km away
  39. 2.52 km SSW of Monument Hills, California · 17423 days ago · 10 km deep · 92 km away
  40. 1.95 km E of East Foothills, California · 17422 days ago · 0 km deep · 59 km away
  41. 1.614 km E of Seven Trees, California · 17422 days ago · 0 km deep · 73 km away
  42. 2.24 km SE of Alum Rock, California · 17422 days ago · 3 km deep · 61 km away
  43. 1.84 km SE of Alum Rock, California · 17422 days ago · 2 km deep · 61 km away
  44. 1.75 km ESE of Alum Rock, California · 17422 days ago · 3 km deep · 61 km away
  45. 2.34 km ESE of Alum Rock, California · 17421 days ago · 2 km deep · 60 km away
  46. 2.04 km ESE of Alum Rock, California · 17421 days ago · 2 km deep · 60 km away
  47. 2.35 km ESE of East Foothills, California · 17421 days ago · 0 km deep · 60 km away
  48. 2.24 km SE of Alum Rock, California · 17421 days ago · 2 km deep · 61 km away
  49. 1.84 km E of East Foothills, California · 17421 days ago · 0 km deep · 58 km away
  50. 1.810 km ESE of East Foothills, California · 17421 days ago · 7 km deep · 64 km away
  51. 3.110 km ESE of East Foothills, California · 17421 days ago · 8 km deep · 64 km away
  52. 2.110 km ESE of East Foothills, California · 17421 days ago · 7 km deep · 64 km away
  53. 1.65 km SE of Alum Rock, California · 17421 days ago · 3 km deep · 62 km away
  54. 1.58 km NNE of Interlaken, California · 17420 days ago · 10 km deep · 96 km away
  55. 1.82 km N of San Leandro, California · 17420 days ago · 3 km deep · 11 km away
  56. 2.53 km S of Diablo, California · 17419 days ago · 19 km deep · 12 km away
  57. 1.74 km SE of Alum Rock, California · 17418 days ago · 2 km deep · 61 km away
  58. 1.7Northern California · 17418 days ago · 3 km deep · 61 km away
  59. 2.54 km SE of Alum Rock, California · 17417 days ago · 3 km deep · 61 km away
  60. 1.55 km SE of Alum Rock, California · 17417 days ago · 2 km deep · 62 km away

The first 60 of 79.

Before

  1. 2.13 km E of Berkeley, California · 17457 days ago · 11 km deep · 14 km away
  2. 2.110 km SE of Sonoma, California · 17460 days ago · 7 km deep · 50 km away
  3. 1.64 km E of Saint Helena, California · 17462 days ago · 5 km deep · 80 km away
  4. 2.419 km WSW of Diablo Grande, California · 17463 days ago · 7 km deep · 79 km away
  5. 2.48 km SE of Sunol, California · 17467 days ago · 10 km deep · 40 km away
  6. 1.76 km NE of Rohnert Park, California · 17467 days ago · 8 km deep · 79 km away
  7. 1.711 km SE of Sunol, California · 17470 days ago · 3 km deep · 43 km away
  8. 2.114 km SE of Livermore, California · 17474 days ago · 1 km deep · 46 km away
  9. 1.74 km E of Livermore, California · 17478 days ago · 9 km deep · 37 km away
  10. 1.510 km ESE of East Foothills, California · 17480 days ago · 8 km deep · 64 km away
  11. 1.810 km ESE of East Foothills, California · 17480 days ago · 8 km deep · 64 km away
  12. 2.112 km SSW of Dillon Beach, California · 17483 days ago · 2 km deep · 88 km away
  13. 1.85 km SSW of Saint Helena, California · 17484 days ago · 5 km deep · 78 km away
  14. 1.916 km ENE of East Foothills, California · 17485 days ago · 6 km deep · 61 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1043749. Read Wed, Sep 30, 2026, 6:27 AM UTC.