California earthquakes

M3.1 earthquake 1 km WNW of Palermo, California

A magnitude 3.1 earthquake struck 1 km WNW of Palermo, California on Thu, Apr 16, 1987, 2:57 PM PDT (21:57 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M3.4 1 km S of Lake Almanor Country Club, California. This one was a foreshock.

Palermo 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
3.1 (Md, duration), minor
Magnitude from
Northern California Seismic System
Local time
UTC
1987-04-16 21:57:36 UTC
Depth
11.5 km (7.1 mi), shallow
Epicenter
39.440° N, 121.557° 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 0.4 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
95°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 1.85 km NE of Clipper Mills, California · 14405 days ago · 13 km deep · 41 km away
  2. 2.011 km NNE of Butte Meadows, California · 14403 days ago · 7 km deep · 82 km away
  3. 1.81 km NW of Lake Almanor Country Club, California · 14400 days ago · 3 km deep · 97 km away
  4. 1.83 km S of Hamilton City, California · 14393 days ago · 10 km deep · 49 km away
  5. 1.73 km SSW of Hamilton City, California · 14393 days ago · 13 km deep · 50 km away
  6. 2.314 km SW of Durham, California · 14389 days ago · 27 km deep · 32 km away
  7. 1.62 km SSW of Sutter, California · 14387 days ago · 5 km deep · 38 km away
  8. 2.011 km W of Richvale, California · 14382 days ago · 5 km deep · 29 km away
  9. 1.815 km N of Princeton, California · 14382 days ago · 20 km deep · 40 km away
  10. 1.86 km SSE of Cottonwood, California · 14381 days ago · 0 km deep · 98 km away
  11. 3.41 km S of Lake Almanor Country Club, California · 14373 days ago · 1 km deep · 95 km away
  12. 2.37 km SSW of Hamilton City, California · 14372 days ago · 17 km deep · 49 km away
  13. 1.86 km SSW of Sutter, California · 14371 days ago · 5 km deep · 42 km away
  14. 2.10 km WNW of Butte Meadows, California · 14365 days ago · 16 km deep · 71 km away
  15. 1.613 km NNW of Belden, California · 14363 days ago · 3 km deep · 79 km away
  16. 2.23 km S of Crescent Mills, California · 14361 days ago · 8 km deep · 89 km away
  17. 2.17 km NNW of Kingvale, California · 14359 days ago · 3 km deep · 94 km away

Before

  1. 1.52 km W of Soda Springs, California · 14418 days ago · 5 km deep · 100 km away
  2. 2.24 km NW of Belden, California · 14419 days ago · 4 km deep · 70 km away
  3. 1.83 km ESE of Chester, California · 14425 days ago · 6 km deep · 100 km away
  4. 1.59 km SW of Mineral, California · 14426 days ago · 8 km deep · 95 km away
  5. 3.114 km S of Kingvale, California · 14427 days ago · 0 km deep · 98 km away
  6. 1.512 km ESE of Mineral, California · 14427 days ago · 3 km deep · 97 km away
  7. 2.36 km SW of Cromberg, California · 14429 days ago · -2 km deep · 82 km away
  8. 2.615 km W of Guinda, California · 14432 days ago · -1 km deep · 99 km away
  9. 1.714 km WSW of Lake Almanor West, California · 14437 days ago · 6 km deep · 83 km away
  10. 2.02 km S of Graeagle, California · 14446 days ago · 6 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc98719. Read Sun, Oct 4, 2026, 8:10 PM UTC.