M1.7 earthquake 18 km E of Mansfield, Washington
A magnitude 1.7 earthquake struck 18 km E of Mansfield, Washington on Sat, Dec 5, 1987, 1:38 AM PST (09:38 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.7 17 km NNW of Banks Lake South, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.7 (md), micro
- Local time
- UTC
- 1987-12-05 09:38:52 UTC
- Depth
- -0.3 km (-0.2 mi), shallow
- Epicenter
- 47.786° N, 119.388° 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 1.6 km horizontally, 0.1 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 88°
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 2 in the 30 days before it.
After
- 1.717 km ESE of Mansfield, Washington · 14164 days ago · 0 km deep · 3 km away
- 2.717 km NNW of Banks Lake South, Washington · 14156 days ago · -1 km deep · 2 km away
- 1.89 km NW of Entiat, Washington · 14135 days ago · 4 km deep · 69 km away
- 2.317 km NNW of Banks Lake South, Washington · 14134 days ago · 0 km deep · 2 km away
- 1.63 km NNW of Entiat, Washington · 14121 days ago · 0 km deep · 63 km away
- 2.17 km NW of Entiat, Washington · 14121 days ago · 2 km deep · 68 km away
- 1.518 km SW of Disautel, Washington · 14115 days ago · 0 km deep · 48 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10227193. Read Tue, Sep 22, 2026, 3:36 PM UTC.