M1.6 earthquake 4 km SSE of Floriston, California
A magnitude 1.6 earthquake struck 4 km SSE of Floriston, California on Tue, Dec 10, 1985, 3:12 AM PST (11:12 UTC), 2 km (2 mi) below the surface.
A larger quake followed: M2.5 5 km WNW of Plumas Eureka (historical), California. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.6 (md), micro
- Local time
- UTC
- 1985-12-10 11:12:39 UTC
- Depth
- 2.5 km (1.6 mi), shallow
- Epicenter
- 39.355° N, 120.004° W
- Region
- Nevada
- 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, 2.3 km in depth
- Magnitude uncertainty
- ±0.01
- Depth from
- From location
- Station coverage gap
- 117°
- Stations used
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 4 in the 30 days before it.
After
- 2.55 km WNW of Plumas Eureka (historical), California · 14896 days ago · 2 km deep · 80 km away
- 1.82 km ESE of Sattley, California · 14880 days ago · 9 km deep · 44 km away
- 1.79 km WNW of Chilcoot-Vinton, California · 14879 days ago · 9 km deep · 58 km away
- 4.610 km SSE of Sierra City, California · 14878 days ago · 6 km deep · 50 km away
- 2.24 km NE of East Quincy, California · 14874 days ago · 4 km deep · 99 km away
- 2.24 km NW of Markleeville, California · 14859 days ago · 4 km deep · 73 km away
- 2.64 km SSW of Markleeville, California · 14857 days ago · 23 km deep · 79 km away
- 2.23 km SSE of Spring Garden, California · 14848 days ago · 4 km deep · 87 km away
- 2.07 km E of Markleeville, California · 14841 days ago · 2 km deep · 79 km away
- 2.8Nevada · 14838 days ago · 5 km deep · 52 km away
Before
- 1.57 km NNW of Truckee, California · 14899 days ago · -1 km deep · 17 km away
- 1.67 km NE of Truckee, California · 14901 days ago · 6 km deep · 12 km away
- 1.67 km NNE of Truckee, California · 14917 days ago · 4 km deep · 13 km away
- 2.614 km WNW of Kingvale, California · 14922 days ago · 2 km deep · 50 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event nc1133672. Read Tue, Sep 22, 2026, 12:15 PM UTC.