M1.6 earthquake 1 km ESE of Entiat, Washington
A magnitude 1.6 earthquake struck 1 km ESE of Entiat, Washington on Tue, Aug 28, 1990, 11:50 PM PDT (06:50 UTC), -1 km (0 mi) below the surface.
A larger quake followed: M2.8 12 km ENE of Sunnyslope, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.6 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1990-08-29 06:50:29 UTC
- Depth
- -0.6 km (-0.4 mi), shallow
- Epicenter
- 47.671° N, 120.185° 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 0.8 km horizontally
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 118°
- Stations used
- 9
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 8 in the 30 days before it.
After
- 1.935 km WSW of Twisp, Washington · 13152 days ago · 6 km deep · 68 km away
- 1.63 km N of Waterville, Washington · 13150 days ago · 5 km deep · 8 km away
- 1.640 km WNW of Granite Falls, Washington · 13134 days ago · 7 km deep · 58 km away
- 1.75 km NW of Waterville, Washington · 13133 days ago · 0 km deep · 5 km away
- 2.812 km ENE of Sunnyslope, Washington · 13127 days ago · 11 km deep · 16 km away
Before
- 1.517 km SSW of Skykomish, Washington · 13185 days ago · 95 km deep · 98 km away
- 1.86 km W of Entiat, Washington · 13193 days ago · -1 km deep · 8 km away
- 1.512 km NNE of Naches, Washington · 13199 days ago · 13 km deep · 99 km away
- 1.910 km WNW of Vantage, Washington · 13203 days ago · 3 km deep · 78 km away
- 1.7Washington · 13203 days ago · 10 km deep · 68 km away
- 1.539 km WNW of Granite Falls, Washington · 13210 days ago · 6 km deep · 55 km away
- 1.73 km N of Entiat, Washington · 13210 days ago · 2 km deep · 5 km away
- 1.715 km ENE of Skykomish, Washington · 13210 days ago · 1 km deep · 73 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10267578. Read Thu, Oct 1, 2026, 10:06 PM UTC.