California earthquakes

M1.5 earthquake 6 km N of Truckee, California

A magnitude 1.5 earthquake struck 6 km N of Truckee, California on Thu, Sep 26, 1985, 7:43 PM PDT (02:43 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M2.2 11 km WNW of Floriston, California. This one was a foreshock.

Truckee 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
1.5 (md), micro
Local time
UTC
1985-09-27 02:43:23 UTC
Depth
1.7 km (1.1 mi), shallow
Epicenter
39.383° N, 120.180° 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 3.9 km horizontally, 7.1 km in depth
Magnitude uncertainty
±0.50
Depth from
From location
Station coverage gap
212°, 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: 17 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 2.211 km WNW of Floriston, California · 14964 days ago · 3 km deep · 7 km away
  2. 2.311 km WNW of Floriston, California · 14964 days ago · 3 km deep · 7 km away
  3. 2.015 km N of Lake Davis, California · 14954 days ago · 4 km deep · 74 km away
  4. 2.06 km SSW of Markleeville, California · 14949 days ago · -1 km deep · 90 km away
  5. 3.04 km S of Sierraville, California · 14948 days ago · 3 km deep · 25 km away
  6. 1.54 km SSE of Sierraville, California · 14948 days ago · 8 km deep · 24 km away
  7. 2.03 km SSW of Sierraville, California · 14948 days ago · -2 km deep · 26 km away
  8. 2.23 km SSE of Sierraville, California · 14948 days ago · 7 km deep · 25 km away
  9. 2.34 km SSE of Nevada City, California · 14947 days ago · 11 km deep · 72 km away
  10. 2.14 km S of Sierraville, California · 14943 days ago · 6 km deep · 24 km away
  11. 2.513 km NE of Lake Davis, California · 14943 days ago · 10 km deep · 67 km away
  12. 2.811 km W of La Porte, California · 14943 days ago · 11 km deep · 88 km away
  13. 1.65 km SSW of Markleeville, California · 14942 days ago · 6 km deep · 89 km away
  14. 1.910 km NNW of Truckee, California · 14940 days ago · 8 km deep · 5 km away
  15. 1.710 km NNE of Truckee, California · 14932 days ago · -1 km deep · 4 km away
  16. 2.614 km WNW of Kingvale, California · 14922 days ago · 2 km deep · 34 km away
  17. 1.67 km NNE of Truckee, California · 14917 days ago · 4 km deep · 3 km away

Before

  1. 1.91 km W of Sierraville, California · 14971 days ago · 7 km deep · 29 km away
  2. 2.05 km SSW of Graeagle, California · 14973 days ago · 3 km deep · 54 km away
  3. 3.010 km NNW of Stagecoach, Nevada · 14994 days ago · 5 km deep · 66 km away
  4. 2.14 km NW of Spring Garden, California · 14994 days ago · 4 km deep · 82 km away
  5. 2.52 km WNW of Sattley, California · 14998 days ago · 3 km deep · 36 km away
  6. 2.34 km NNE of Plumas Eureka, California · 15000 days ago · 11 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc56770. Read Tue, Sep 22, 2026, 10:21 AM UTC.