M1.6 earthquake 8 km SSW of Chelan Falls, Washington
A magnitude 1.6 earthquake struck 8 km SSW of Chelan Falls, Washington on Sat, Apr 6, 1991, 9:03 PM PST (05:03 UTC), 3 km (2 mi) below the surface.
A larger quake followed: M3.9 4 km SE of Pateros, 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
- 1991-04-07 05:03:29 UTC
- Depth
- 2.7 km (1.7 mi), shallow
- Epicenter
- 47.723° N, 120.012° 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, 2.3 km in depth
- Magnitude uncertainty
- ±0.08
- Depth from
- From location
- Station coverage gap
- 87°
- 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: 7 in the 60 days after this one and 5 in the 30 days before it.
After
- 3.94 km SE of Pateros, Washington · 12955 days ago · 11 km deep · 36 km away
- 1.515 km ENE of Twisp, Washington · 12955 days ago · 0 km deep · 79 km away
- 1.912 km S of Leavenworth, Washington · 12955 days ago · -1 km deep · 56 km away
- 3.155 km WNW of Granite Falls, Washington · 12944 days ago · -1 km deep · 78 km away
- 1.87 km NNE of Entiat, Washington · 12943 days ago · 0 km deep · 13 km away
- 1.515 km E of Kittitas, Washington · 12940 days ago · 8 km deep · 85 km away
- 2.456 km WNW of Granite Falls, Washington · 12938 days ago · 5 km deep · 79 km away
Before
- 2.713 km W of Mansfield, Washington · 12968 days ago · 0 km deep · 19 km away
- 3.38 km W of Entiat, Washington · 12974 days ago · -1 km deep · 24 km away
- 2.39 km SW of Royal City, Washington · 12983 days ago · 3 km deep · 100 km away
- 1.89 km WSW of Royal City, Washington · 12986 days ago · 0 km deep · 98 km away
- 1.89 km SW of Royal City, Washington · 12987 days ago · 3 km deep · 99 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10272358. Read Sat, Oct 3, 2026, 3:37 PM UTC.