M1.9 earthquake 17 km E of Mansfield, Washington
A magnitude 1.9 earthquake struck 17 km E of Mansfield, Washington on Sat, Oct 17, 1987, 1:23 PM PDT (20:23 UTC), -1 km (0 mi) below the surface.
A larger quake followed: M2.0 5 km WNW 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
- 1.9 (md), micro
- Local time
- UTC
- 1987-10-17 20:23:51 UTC
- Depth
- -0.8 km (-0.5 mi), shallow
- Epicenter
- 47.801° N, 119.405° 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 0.2 km horizontally, 0.5 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- Operator assigned
- Station coverage gap
- 92°
- Stations used
- 18
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 5 in the 30 days before it.
After
- 1.56 km NW of Entiat, Washington · 14213 days ago · 0 km deep · 65 km away
- 2.05 km WNW of Quincy, Washington · 14203 days ago · 5 km deep · 72 km away
- 1.615 km NE of Marlin, Washington · 14181 days ago · 0 km deep · 54 km away
- 2.01 km NNE of Entiat, Washington · 14177 days ago · 0 km deep · 61 km away
- 1.718 km E of Mansfield, Washington · 14171 days ago · 0 km deep · 2 km away
- 1.717 km ESE of Mansfield, Washington · 14164 days ago · 0 km deep · 4 km away
Before
- 2.616 km NNW of Vantage, Washington · 14231 days ago · 0 km deep · 96 km away
- 1.516 km NNW of Vantage, Washington · 14235 days ago · 0 km deep · 95 km away
- 2.112 km SSE of Okanogan, Washington · 14239 days ago · -1 km deep · 51 km away
- 2.09 km SSW of Chelan Falls, Washington · 14240 days ago · 2 km deep · 48 km away
- 1.54 km N of Waterville, Washington · 14245 days ago · 2 km deep · 52 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10225853. Read Tue, Sep 22, 2026, 8:20 AM UTC.