California earthquakes

M1.7 earthquake 13 km NNE of Old Station, California

A magnitude 1.7 earthquake struck 13 km NNE of Old Station, California on Mon, Dec 23, 1985, 9:22 PM PST (05:22 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.2 4 km ESE of Bella Vista, 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
1.7 (md), micro
Local time
UTC
1985-12-24 05:22:00 UTC
Depth
2.7 km (1.6 mi), shallow
Epicenter
40.785° N, 121.359° 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 1.7 km horizontally, 6.2 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
249°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 1.53 km N of Lake Almanor West, California · 14882 days ago · 5 km deep · 59 km away
  2. 1.61 km NW of Lake Almanor West, California · 14882 days ago · 2 km deep · 62 km away
  3. 3.24 km ESE of Bella Vista, California · 14876 days ago · 19 km deep · 72 km away
  4. 2.37 km ESE of Millville, California · 14871 days ago · -1 km deep · 68 km away
  5. 1.50 km NNW of Lake Almanor Peninsula, California · 14869 days ago · 6 km deep · 59 km away
  6. 1.911 km NE of Mountain Gate, California · 14863 days ago · 17 km deep · 73 km away
  7. 2.214 km W of Chester, California · 14857 days ago · 4 km deep · 56 km away
  8. 2.112 km NE of Bend, California · 14857 days ago · 19 km deep · 80 km away
  9. 1.86 km ESE of Bella Vista, California · 14850 days ago · 19 km deep · 71 km away
  10. 2.17 km NNE of Proberta, California · 14848 days ago · 6 km deep · 97 km away
  11. 1.68 km N of Cassel, California · 14845 days ago · 12 km deep · 28 km away
  12. 1.82 km SSE of Prattville, California · 14839 days ago · 8 km deep · 69 km away
  13. 1.86 km S of Prattville, California · 14837 days ago · 4 km deep · 72 km away
  14. 2.09 km W of Burney, California · 14833 days ago · 14 km deep · 36 km away

Before

  1. 2.33 km SE of Canyondam, California · 14890 days ago · 4 km deep · 76 km away
  2. 2.113 km NNE of Mineral, California · 14893 days ago · 3 km deep · 39 km away
  3. 1.74 km WNW of Greenville, California · 14894 days ago · 0 km deep · 77 km away
  4. 1.95 km N of Lakehead, California · 14899 days ago · 8 km deep · 88 km away
  5. 2.115 km NNW of Shingletown, California · 14904 days ago · 9 km deep · 53 km away
  6. 3.05 km S of Millville, California · 14904 days ago · 4 km deep · 75 km away
  7. 1.712 km SSW of Lake Almanor West, California · 14906 days ago · 2 km deep · 73 km away
  8. 1.816 km N of Big Bend, California · 14910 days ago · 3 km deep · 62 km away
  9. 1.62 km NNW of Greenville, California · 14911 days ago · 0 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc63456. Read Tue, Sep 22, 2026, 10:30 PM UTC.