M2.2 earthquake 1 km NE of Brush Prairie, Washington
A magnitude 2.2 earthquake struck 1 km NE of Brush Prairie, Washington on Fri, Sep 6, 1985, 10:03 AM PDT (17:03 UTC), 15 km (9 mi) below the surface.
A larger quake followed: M2.3 4 km SW of Sandy, Oregon. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.2 (md), micro
- Local time
- UTC
- 1985-09-06 17:03:22 UTC
- Depth
- 15.2 km (9.5 mi), shallow
- Epicenter
- 45.744° N, 122.527° W
- Region
- Washington
- 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, 0.9 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 70°
- Stations used
- 34
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 5 in the 30 days before it.
After
- 1.829 km S of Morton, Washington · 14986 days ago · 10 km deep · 65 km away
- 1.639 km NNE of Amboy, Washington · 14982 days ago · -2 km deep · 58 km away
- 1.637 km NNE of Amboy, Washington · 14971 days ago · -1 km deep · 57 km away
- 2.24 km S of Bingen, Washington · 14964 days ago · 7 km deep · 83 km away
- 1.611 km NNE of La Center, Washington · 14954 days ago · 8 km deep · 24 km away
- 1.523 km E of Castle Rock, Washington · 14953 days ago · 19 km deep · 62 km away
- 2.138 km S of Morton, Washington · 14949 days ago · -2 km deep · 58 km away
- 1.6Washington · 14937 days ago · 16 km deep · 87 km away
- 2.34 km SW of Sandy, Oregon · 14937 days ago · 20 km deep · 45 km away
Before
- 2.5Washington · 14992 days ago · 6 km deep · 68 km away
- 1.538 km NNE of Amboy, Washington · 14997 days ago · -2 km deep · 57 km away
- 1.538 km NNE of Amboy, Washington · 15005 days ago · -2 km deep · 58 km away
- 1.538 km NNE of Amboy, Washington · 15006 days ago · -2 km deep · 57 km away
- 1.738 km S of Morton, Washington · 15007 days ago · -2 km deep · 58 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10192718. Read Tue, Sep 22, 2026, 12:20 PM UTC.