M1.8 earthquake 4 km NNE of Chelan, Washington
A magnitude 1.8 earthquake struck 4 km NNE of Chelan, Washington on Tue, Apr 21, 1981, 7:00 PM PST (03:00 UTC), 9 km (5 mi) below the surface.
A larger quake followed: M1.9 9 km NE of East Wenatchee Bench, 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
- 1981-04-22 03:00:01 UTC
- Depth
- 8.5 km (5.3 mi), shallow
- Epicenter
- 47.882° N, 120.002° 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, 0.6 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- From location
- Station coverage gap
- 84°
- Stations used
- 14
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 4 in the 30 days before it.
After
- 1.99 km NE of East Wenatchee Bench, Washington · 16587 days ago · 0 km deep · 45 km away
- 2.66 km WSW of Entiat, Washington · 16555 days ago · 2 km deep · 33 km away
- 2.512 km ESE of Waterville, Washington · 16552 days ago · 0 km deep · 30 km away
- 2.83 km SE of Waterville, Washington · 16540 days ago · -1 km deep · 28 km away
Before
- 1.517 km WSW of Electric City, Washington · 16594 days ago · 0 km deep · 55 km away
- 1.79 km NNE of Entiat, Washington · 16605 days ago · 3 km deep · 19 km away
- 2.79 km W of Entiat, Washington · 16610 days ago · 0 km deep · 34 km away
- 1.88 km WSW of George, Washington · 16619 days ago · 0 km deep · 94 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10106608. Read Tue, Sep 22, 2026, 2:09 PM UTC.