M1.8 earthquake 10 km W of Mansfield, Washington
A magnitude 1.8 earthquake struck 10 km W of Mansfield, Washington on Tue, Apr 8, 1986, 10:32 PM PST (06:32 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M2.6 11 km SW of Quincy, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.8 (md), micro
- Local time
- UTC
- 1986-04-09 06:32:25 UTC
- Depth
- 10.5 km (6.5 mi), shallow
- Epicenter
- 47.820° N, 119.773° 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 0.6 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 114°
- 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 5 in the 30 days before it.
After
- 2.611 km SW of Quincy, Washington · 14784 days ago · 3 km deep · 74 km away
- 2.313 km N of Almira, Washington · 14780 days ago · 6 km deep · 63 km away
- 1.52 km WSW of Entiat, Washington · 14776 days ago · 8 km deep · 39 km away
- 1.87 km SE of Marlin, Washington · 14763 days ago · 11 km deep · 82 km away
- 2.410 km ESE of Marlin, Washington · 14742 days ago · 7 km deep · 86 km away
- 1.817 km NNW of Banks Lake South, Washington · 14741 days ago · 0 km deep · 29 km away
- 1.61 km W of Entiat, Washington · 14728 days ago · 9 km deep · 38 km away
- 2.214 km W of Entiat, Washington · 14726 days ago · 8 km deep · 50 km away
Before
- 3.310 km N of Entiat, Washington · 14785 days ago · 13 km deep · 35 km away
- 1.95 km ENE of Entiat, Washington · 14785 days ago · 4 km deep · 30 km away
- 1.919 km SSW of Disautel, Washington · 14794 days ago · 0 km deep · 54 km away
- 1.68 km S of Chelan Falls, Washington · 14813 days ago · 4 km deep · 20 km away
- 1.65 km ENE of Manson, Washington · 14814 days ago · -1 km deep · 25 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10203193. Read Wed, Sep 30, 2026, 8:13 AM UTC.