California earthquakes

M2.4 earthquake 3 km NNW of Pacifica, California

A magnitude 2.4 earthquake struck 3 km NNW of Pacifica, California on Thu, Mar 3, 1977, 3:25 PM PST (23:25 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.4 18 km ENE of East Foothills, 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
2.4 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1977-03-03 23:25:36 UTC
Depth
8.3 km (5.2 mi), shallow
Epicenter
37.644° N, 122.502° 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 0.3 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
113°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 57 in the 60 days after this one and 43 in the 30 days before it.

After

  1. 1.78 km SE of Livermore, California · 18108 days ago · 8 km deep · 71 km away
  2. 1.84 km NNE of Fairview, California · 18107 days ago · 6 km deep · 43 km away
  3. 2.58 km ESE of East Foothills, California · 18107 days ago · 7 km deep · 76 km away
  4. 1.99 km ESE of East Foothills, California · 18106 days ago · 7 km deep · 76 km away
  5. 2.43 km NNE of Santa Rosa, California · 18106 days ago · 8 km deep · 93 km away
  6. 1.713 km N of Morgan Hill, California · 18106 days ago · 6 km deep · 85 km away
  7. 2.52 km WNW of Cambrian Park, California · 18099 days ago · 8 km deep · 64 km away
  8. 1.66 km ESE of Lexington Hills, California · 18098 days ago · 11 km deep · 77 km away
  9. 2.911 km N of Pittsburg, California · 18097 days ago · 19 km deep · 75 km away
  10. 1.98 km W of Saint Helena, California · 18094 days ago · 7 km deep · 95 km away
  11. 2.40 km WSW of Larkfield-Wikiup, California · 18094 days ago · 2 km deep · 99 km away
  12. 3.418 km ENE of East Foothills, California · 18093 days ago · 6 km deep · 82 km away
  13. 2.33 km NE of Day Valley, California · 18093 days ago · 4 km deep · 88 km away
  14. 1.917 km ENE of East Foothills, California · 18093 days ago · 7 km deep · 81 km away
  15. 1.57 km NNW of Morgan Hill, California · 18093 days ago · 4 km deep · 87 km away
  16. 2.06 km S of Calistoga, California · 18090 days ago · 5 km deep · 98 km away
  17. 2.26 km S of Moskowite Corner, California · 18089 days ago · 12 km deep · 86 km away
  18. 1.92 km NNE of Los Gatos, California · 18088 days ago · 7 km deep · 65 km away
  19. 3.33 km W of Moskowite Corner, California · 18086 days ago · 7 km deep · 92 km away
  20. 2.95 km NNE of Penngrove, California · 18086 days ago · 7 km deep · 79 km away
  21. 2.22 km NNE of Union City, California · 18085 days ago · 4 km deep · 44 km away
  22. 1.85 km NNE of Corralitos, California · 18084 days ago · 2 km deep · 93 km away
  23. 1.88 km N of Boulder Creek, California · 18082 days ago · 13 km deep · 59 km away
  24. 2.71 km E of Hayward, California · 18081 days ago · 6 km deep · 39 km away
  25. 2.72 km WNW of Cambrian Park, California · 18081 days ago · 9 km deep · 64 km away
  26. 2.32 km SSW of Campbell, California · 18081 days ago · 7 km deep · 64 km away
  27. 3.02 km WNW of Cambrian Park, California · 18080 days ago · 9 km deep · 64 km away
  28. 2.02 km W of Cambrian Park, California · 18080 days ago · 7 km deep · 64 km away
  29. 2.92 km WNW of Cambrian Park, California · 18077 days ago · 8 km deep · 64 km away
  30. 2.59 km NNW of Boulder Creek, California · 18076 days ago · 5 km deep · 57 km away
  31. 1.82 km WNW of Cambrian Park, California · 18076 days ago · 7 km deep · 64 km away
  32. 1.82 km WNW of Cambrian Park, California · 18076 days ago · 8 km deep · 64 km away
  33. 2.38 km NNE of Pittsburg, California · 18076 days ago · 20 km deep · 77 km away
  34. 2.215 km SW of Tracy, California · 18076 days ago · 3 km deep · 84 km away
  35. 2.411 km ENE of Blackhawk, California · 18075 days ago · 11 km deep · 67 km away
  36. 2.14 km SSE of Fairview, California · 18075 days ago · 4 km deep · 41 km away
  37. 1.810 km ENE of Blackhawk, California · 18075 days ago · 5 km deep · 66 km away
  38. 1.97 km WSW of Kenwood, California · 18073 days ago · 9 km deep · 84 km away
  39. 2.07 km WSW of Kenwood, California · 18073 days ago · 10 km deep · 84 km away
  40. 2.012 km N of Morgan Hill, California · 18073 days ago · 5 km deep · 89 km away
  41. 1.63 km E of Day Valley, California · 18071 days ago · 3 km deep · 91 km away
  42. 1.83 km E of Day Valley, California · 18071 days ago · 3 km deep · 91 km away
  43. 1.52 km WNW of Cambrian Park, California · 18071 days ago · 8 km deep · 64 km away
  44. 2.411 km N of Pittsburg, California · 18069 days ago · 23 km deep · 77 km away
  45. 2.310 km N of Pittsburg, California · 18069 days ago · 21 km deep · 77 km away
  46. 1.99 km NE of Corralitos, California · 18069 days ago · 12 km deep · 95 km away
  47. 2.121 km ENE of East Foothills, California · 18068 days ago · 7 km deep · 80 km away
  48. 1.92 km E of Berkeley, California · 18065 days ago · 10 km deep · 34 km away
  49. 1.810 km NW of Morgan Hill, California · 18063 days ago · 6 km deep · 84 km away
  50. 1.714 km N of Morgan Hill, California · 18057 days ago · 4 km deep · 87 km away
  51. 1.813 km E of East Foothills, California · 18055 days ago · 8 km deep · 80 km away
  52. 1.97 km ESE of Fremont, California · 18054 days ago · 0 km deep · 54 km away
  53. 1.78 km S of Muir Beach, California · 18054 days ago · 8 km deep · 17 km away
  54. 2.113 km E of East Foothills, California · 18052 days ago · 8 km deep · 80 km away
  55. 1.5Northern California · 18052 days ago · 7 km deep · 60 km away
  56. 2.746 km SW of Inverness, California · 18051 days ago · 0 km deep · 67 km away
  57. 1.94 km S of Crockett, California · 18051 days ago · 9 km deep · 49 km away

Before

  1. 1.67 km NNE of East Foothills, California · 18109 days ago · 7 km deep · 67 km away
  2. 1.61 km WSW of Alamo, California · 18111 days ago · 9 km deep · 46 km away
  3. 3.00 km SW of Alamo, California · 18111 days ago · 10 km deep · 46 km away
  4. 2.77 km NNE of Morgan Hill, California · 18114 days ago · 4 km deep · 92 km away
  5. 1.62 km W of Cambrian Park, California · 18115 days ago · 7 km deep · 64 km away
  6. 2.18 km ENE of Seven Trees, California · 18115 days ago · 2 km deep · 76 km away
  7. 1.93 km ESE of Lexington Hills, California · 18116 days ago · 10 km deep · 74 km away
  8. 2.08 km ENE of Seven Trees, California · 18116 days ago · 2 km deep · 75 km away
  9. 2.66 km E of Larkfield-Wikiup, California · 18116 days ago · 6 km deep · 99 km away
  10. 2.03 km NE of Morgan Hill, California · 18117 days ago · 1 km deep · 94 km away
  11. 1.813 km ENE of East Foothills, California · 18118 days ago · 5 km deep · 77 km away
  12. 2.09 km ENE of Morgan Hill, California · 18118 days ago · 5 km deep · 100 km away
  13. 2.612 km SSE of Davenport, California · 18119 days ago · 8 km deep · 88 km away
  14. 2.16 km NE of East Foothills, California · 18119 days ago · 6 km deep · 70 km away
  15. 1.76 km E of East Foothills, California · 18119 days ago · 3 km deep · 72 km away
  16. 2.47 km ESE of Lexington Hills, California · 18121 days ago · 12 km deep · 78 km away
  17. 2.65 km NW of Broadmoor, California · 18121 days ago · 0 km deep · 9 km away
  18. 2.55 km NW of Broadmoor, California · 18121 days ago · 0 km deep · 9 km away
  19. 2.25 km NW of Broadmoor, California · 18121 days ago · 3 km deep · 9 km away
  20. 2.81 km NE of Diablo, California · 18122 days ago · 9 km deep · 54 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1034242. Read Fri, Oct 2, 2026, 2:24 AM UTC.