California earthquakes

M1.7 earthquake 26km NE of Foresthill, CA

A magnitude 1.7 earthquake struck 26km NE of Foresthill, CA on Thu, May 9, 1985, 9:04 PM PDT (04:04 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M1.8 3 km WSW of Markleeville, 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
1985-05-10 04:04:16 UTC
Depth
14.2 km (8.8 mi), shallow
Epicenter
39.192° N, 120.616° 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, 1.2 km in depth
Magnitude uncertainty
±0.27
Depth from
From location
Station coverage gap
144°
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 1.62 km W of Markleeville, California · 15104 days ago · -1 km deep · 89 km away
  2. 1.83 km WSW of Markleeville, California · 15102 days ago · -1 km deep · 89 km away
  3. 1.710 km N of Truckee, California · 15101 days ago · 11 km deep · 44 km away
  4. 3.42 km SSW of Sattley, California · 15099 days ago · 3 km deep · 47 km away
  5. 2.03 km NE of East Quincy, California · 15096 days ago · 4 km deep · 88 km away
  6. 1.710 km NNW of Truckee, California · 15093 days ago · 10 km deep · 43 km away
  7. 1.710 km NNW of Truckee, California · 15093 days ago · 9 km deep · 43 km away
  8. 2.214 km NNE of Lake Davis, California · 15090 days ago · 11 km deep · 91 km away
  9. 2.5Northern California · 15090 days ago · 5 km deep · 90 km away
  10. 2.44 km S of Oroville East, California · 15086 days ago · 2 km deep · 80 km away
  11. 1.82 km SE of Sierraville, California · 15075 days ago · 0 km deep · 48 km away
  12. 2.09 km NNE of Truckee, California · 15075 days ago · 5 km deep · 46 km away
  13. 2.01 km SSE of Sierraville, California · 15075 days ago · -1 km deep · 48 km away
  14. 1.91 km SSE of Sierraville, California · 15073 days ago · -1 km deep · 48 km away
  15. 2.07 km NNW of Kingvale, California · 15067 days ago · 6 km deep · 25 km away
  16. 1.58 km N of Truckee, California · 15062 days ago · 6 km deep · 45 km away
  17. 1.77 km NE of Truckee, California · 15061 days ago · 7 km deep · 47 km away
  18. 2.07 km NE of Truckee, California · 15059 days ago · 7 km deep · 46 km away
  19. 2.46 km SE of Markleeville, California · 15059 days ago · -2 km deep · 97 km away
  20. 1.84 km SSE of Rocklin, California · 15059 days ago · 12 km deep · 72 km away
  21. 2.74 km SSE of Rocklin, California · 15058 days ago · 11 km deep · 72 km away
  22. 1.74 km SSE of Rocklin, California · 15058 days ago · 12 km deep · 71 km away
  23. 1.64 km SSE of Rocklin, California · 15058 days ago · 12 km deep · 72 km away
  24. 2.16 km NNW of Verdi, California · 15057 days ago · 2 km deep · 66 km away
  25. 2.37 km SSW of Kingvale, California · 15055 days ago · -1 km deep · 15 km away
  26. 1.94 km SSE of Sierraville, California · 15054 days ago · 3 km deep · 46 km away

Before

  1. 2.710 km N of Truckee, California · 15116 days ago · 7 km deep · 44 km away
  2. 1.74 km S of Markleeville, California · 15117 days ago · 1 km deep · 94 km away
  3. 2.15 km S of Markleeville, California · 15117 days ago · 0 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc47533. Read Tue, Sep 22, 2026, 9:29 PM UTC.