California earthquakes

M3.3 earthquake 3 km E of Angwin, California

A magnitude 3.3 earthquake struck 3 km E of Angwin, California on Sun, Mar 24, 1974, 12:59 PM PDT (19:59 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M3.9 8 km SSW of Cobb, 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.

Open the live map with earthquakes

The earthquake

Magnitude
3.3 (Md, duration), minor
Magnitude from
Northern California Seismic System
Local time
UTC
1974-03-24 19:59:26 UTC
Depth
8.8 km (5.5 mi), shallow
Epicenter
38.581° N, 122.410° 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 5.9 km horizontally, 2.4 km in depth
Magnitude uncertainty
±0.25
Depth from
From location
Station coverage gap
283°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 21 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 3.12 km NNW of Ashland, California · 19184 days ago · 10 km deep · 99 km away
  2. 3.66 km SE of Cottonwood, California · 19183 days ago · 15 km deep · 42 km away
  3. 1.85 km ENE of Tiburon, California · 19180 days ago · 10 km deep · 77 km away
  4. 2.22 km ESE of Larkfield-Wikiup, California · 19180 days ago · 4 km deep · 29 km away
  5. 2.67 km ENE of Penngrove, California · 19178 days ago · 0 km deep · 33 km away
  6. 3.98 km SSW of Cobb, California · 19170 days ago · 5 km deep · 37 km away
  7. 1.63 km NNE of Elmira, California · 19159 days ago · 7 km deep · 50 km away
  8. 2.010 km N of Pittsburg, California · 19157 days ago · 21 km deep · 68 km away
  9. 2.310 km N of Pittsburg, California · 19157 days ago · 21 km deep · 68 km away
  10. 2.51 km W of Bay Point, California · 19156 days ago · 15 km deep · 72 km away
  11. 2.112 km NW of Moskowite Corner, California · 19155 days ago · 16 km deep · 13 km away
  12. 2.73 km SE of Hartley, California · 19154 days ago · 6 km deep · 47 km away
  13. 2.26 km SSW of Yountville, California · 19151 days ago · 9 km deep · 25 km away
  14. 3.06 km ESE of Angwin, California · 19151 days ago · 7 km deep · 4 km away
  15. 2.5Northern California · 19150 days ago · 7 km deep · 18 km away
  16. 3.07 km WSW of Cobb, California · 19146 days ago · 3 km deep · 43 km away
  17. 2.12 km E of Larkfield-Wikiup, California · 19141 days ago · 7 km deep · 28 km away
  18. 1.83 km E of Windsor, California · 19140 days ago · 4 km deep · 32 km away
  19. 2.6Northern California · 19136 days ago · 7 km deep · 30 km away
  20. 2.4Northern California · 19134 days ago · 7 km deep · 30 km away
  21. 1.96 km WSW of Kenwood, California · 19125 days ago · 9 km deep · 28 km away

Before

  1. 3.310 km S of Cobb, California · 19187 days ago · 6 km deep · 34 km away
  2. 1.78 km NNW of Bay Point, California · 19188 days ago · 21 km deep · 65 km away
  3. 2.05 km ENE of Rohnert Park, California · 19189 days ago · 6 km deep · 32 km away
  4. 1.84 km N of Pittsburg, California · 19193 days ago · 17 km deep · 73 km away
  5. 1.66 km S of Green Valley, California · 19197 days ago · 7 km deep · 47 km away
  6. 1.79 km NW of Broadmoor, California · 19198 days ago · 11 km deep · 94 km away
  7. 1.62 km NNE of San Leandro, California · 19206 days ago · 3 km deep · 96 km away
  8. 2.46 km ENE of Penngrove, California · 19207 days ago · 8 km deep · 33 km away
  9. 2.57 km WSW of Cobb, California · 19207 days ago · 3 km deep · 42 km away
  10. 2.65 km NE of Geyserville, California · 19208 days ago · 2 km deep · 44 km away
  11. 2.56 km ESE of Hidden Valley Lake, California · 19208 days ago · 3 km deep · 23 km away
  12. 3.67 km WSW of Cobb, California · 19210 days ago · 3 km deep · 42 km away
  13. 3.111 km SE of Hidden Valley Lake, California · 19211 days ago · 12 km deep · 18 km away
  14. 2.88 km WSW of Cobb, California · 19212 days ago · 4 km deep · 42 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1019109. Read Fri, Oct 2, 2026, 6:45 AM UTC.