M1.6 earthquake 6 km NE of Trinity Center, California
A magnitude 1.6 earthquake struck 6 km NE of Trinity Center, California on Tue, Mar 19, 1985, 8:34 AM PST (16:34 UTC), 4 km (2 mi) below the surface.
A larger quake followed: M2.9 14 km E of Cottonwood, 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
- 1985-03-19 16:34:39 UTC
- Depth
- 3.9 km (2.4 mi), shallow
- Epicenter
- 41.026° N, 122.643° W
- Region
- California
- 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 1.6 km horizontally, 7.5 km in depth
- Magnitude uncertainty
- ±0.08
- Depth from
- From location
- Station coverage gap
- 130°
- Stations used
- 4
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 7 in the 30 days before it.
After
- 2.914 km E of Cottonwood, California · 15150 days ago · 11 km deep · 85 km away
- 3.01 km ESE of Anderson, California · 15147 days ago · 68 km deep · 72 km away
- 2.324 km SSW of Etna, California · 15120 days ago · 3 km deep · 39 km away
- 1.912 km ENE of Bend, California · 15116 days ago · 7 km deep · 93 km away
- 2.412 km ENE of Shingletown, California · 15108 days ago · 35 km deep · 94 km away
- 1.917 km W of Junction City, California · 15108 days ago · 2 km deep · 62 km away
- 2.419 km N of Big Bend, California · 15107 days ago · 8 km deep · 63 km away
- 1.811 km WNW of Lakehead, California · 15105 days ago · 4 km deep · 15 km away
Before
- 2.411 km NW of Ruth, California · 15167 days ago · 29 km deep · 100 km away
- 3.226 km NE of Willow Creek, California · 15167 days ago · 34 km deep · 63 km away
- 4.629 km SSW of Etna, California · 15168 days ago · 4 km deep · 38 km away
- 3.514 km NNE of French Gulch, California · 15172 days ago · 13 km deep · 25 km away
- 1.79 km W of Cottonwood, California · 15173 days ago · 5 km deep · 76 km away
- 1.85 km WSW of Bella Vista, California · 15187 days ago · 4 km deep · 54 km away
- 2.115 km NNE of Shingletown, California · 15189 days ago · 13 km deep · 83 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event nc1126692. Read Tue, Sep 22, 2026, 9:19 PM UTC.