California earthquakes

M3.0 earthquake 6 km ESE of Angwin, California

A magnitude 3.0 earthquake struck 6 km ESE of Angwin, California on Sat, Apr 27, 1974, 10:45 AM PDT (17:45 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M4.3 2 km SE of Larkfield-Wikiup, California. This one was a foreshock.

Angwin 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
3.0 (Md, duration), minor
Magnitude from
Northern California Seismic System
Local time
UTC
1974-04-27 17:45:00 UTC
Depth
7.4 km (4.6 mi), shallow
Epicenter
38.550° N, 122.383° 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 1.0 km horizontally, 3.0 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
207°, poorly surrounded by stations
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 28 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 2.5Northern California · 19150 days ago · 7 km deep · 16 km away
  2. 3.07 km WSW of Cobb, California · 19147 days ago · 3 km deep · 47 km away
  3. 2.12 km E of Larkfield-Wikiup, California · 19142 days ago · 7 km deep · 29 km away
  4. 1.83 km E of Windsor, California · 19141 days ago · 4 km deep · 34 km away
  5. 2.6Northern California · 19137 days ago · 7 km deep · 32 km away
  6. 2.4Northern California · 19135 days ago · 7 km deep · 32 km away
  7. 1.96 km WSW of Kenwood, California · 19126 days ago · 9 km deep · 27 km away
  8. 1.85 km NE of Santa Rosa, California · 19125 days ago · 6 km deep · 26 km away
  9. 2.06 km ENE of Rohnert Park, California · 19124 days ago · 1 km deep · 30 km away
  10. 1.75 km SSW of Green Valley, California · 19121 days ago · 10 km deep · 42 km away
  11. 2.24 km SW of Yountville, California · 19121 days ago · 8 km deep · 20 km away
  12. 2.56 km ENE of Rohnert Park, California · 19118 days ago · 3 km deep · 30 km away
  13. 2.45 km ENE of Santa Rosa, California · 19117 days ago · 11 km deep · 25 km away
  14. 2.36 km ENE of Santa Rosa, California · 19117 days ago · 11 km deep · 25 km away
  15. 1.93 km SW of Rutherford, California · 19116 days ago · 6 km deep · 14 km away
  16. 2.04 km NW of Noe Valley, California · 19114 days ago · 18 km deep · 86 km away
  17. 2.64 km NW of Noe Valley, California · 19112 days ago · 16 km deep · 87 km away
  18. 3.17 km NE of Rohnert Park, California · 19111 days ago · 4 km deep · 29 km away
  19. 2.77 km NE of Rohnert Park, California · 19111 days ago · 3 km deep · 28 km away
  20. 2.57 km NE of Rohnert Park, California · 19111 days ago · 4 km deep · 29 km away
  21. 2.56 km NE of Rohnert Park, California · 19111 days ago · 5 km deep · 30 km away
  22. 2.17 km NE of Rohnert Park, California · 19110 days ago · 2 km deep · 29 km away
  23. 4.32 km SE of Larkfield-Wikiup, California · 19107 days ago · 6 km deep · 31 km away
  24. 1.94 km SE of San Ramon, California · 19107 days ago · 7 km deep · 96 km away
  25. 2.63 km E of Berkeley, California · 19103 days ago · 11 km deep · 76 km away
  26. 2.53 km NE of San Leandro, California · 19102 days ago · 6 km deep · 91 km away
  27. 1.96 km ENE of Rohnert Park, California · 19091 days ago · 5 km deep · 30 km away
  28. 2.16 km ENE of Rohnert Park, California · 19091 days ago · 5 km deep · 30 km away

Before

  1. 2.26 km SSW of Yountville, California · 19152 days ago · 9 km deep · 22 km away
  2. 2.73 km SE of Hartley, California · 19155 days ago · 6 km deep · 44 km away
  3. 2.112 km NW of Moskowite Corner, California · 19156 days ago · 16 km deep · 9 km away
  4. 2.51 km W of Bay Point, California · 19156 days ago · 15 km deep · 68 km away
  5. 2.310 km N of Pittsburg, California · 19158 days ago · 21 km deep · 64 km away
  6. 2.010 km N of Pittsburg, California · 19158 days ago · 21 km deep · 64 km away
  7. 1.73 km SSW of Broadmoor, California · 19160 days ago · 7 km deep · 100 km away
  8. 1.63 km NNE of Elmira, California · 19160 days ago · 7 km deep · 47 km away
  9. 3.98 km SSW of Cobb, California · 19171 days ago · 5 km deep · 41 km away
  10. 2.67 km ENE of Penngrove, California · 19178 days ago · 0 km deep · 32 km away
  11. 2.22 km ESE of Larkfield-Wikiup, California · 19181 days ago · 4 km deep · 30 km away
  12. 1.85 km ENE of Tiburon, California · 19181 days ago · 10 km deep · 73 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1019452. Read Fri, Oct 2, 2026, 9:43 PM UTC.