M2.1 earthquake 6 km S of Granite Falls, Washington
A magnitude 2.1 earthquake struck 6 km S of Granite Falls, Washington on Wed, Apr 21, 1976, 2:33 PM PST (22:33 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.2 4 km SSE of Entiat, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.1 (md), micro
- Local time
- UTC
- 1976-04-21 22:33:46 UTC
- Depth
- -0.3 km (-0.2 mi), shallow
- Epicenter
- 47.832° N, 120.206° 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 0.3 km horizontally
- Magnitude uncertainty
- ±0.16
- Depth from
- From location
- Station coverage gap
- 179°
- 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: 8 in the 60 days after this one and 4 in the 30 days before it.
After
- 1.912 km W of Quincy, Washington · 18400 days ago · 0 km deep · 68 km away
- 2.24 km SSE of Entiat, Washington · 18394 days ago · 9 km deep · 21 km away
- 1.617 km ENE of George, Washington · 18394 days ago · 12 km deep · 89 km away
- 1.818 km ENE of George, Washington · 18394 days ago · 16 km deep · 88 km away
- 1.817 km ENE of George, Washington · 18394 days ago · 4 km deep · 89 km away
- 3.17 km N of Waterville, Washington · 18392 days ago · 7 km deep · 17 km away
- 2.112 km NW of Entiat, Washington · 18390 days ago · 0 km deep · 13 km away
- 3.010 km WSW of Entiat, Washington · 18361 days ago · 0 km deep · 25 km away
Before
- 1.59 km N of Chelan, Washington · 18420 days ago · 0 km deep · 16 km away
- 1.81 km SE of North Omak, Washington · 18422 days ago · 0 km deep · 88 km away
- 1.615 km S of Leavenworth, Washington · 18428 days ago · 5 km deep · 55 km away
- 1.94 km E of Entiat, Washington · 18439 days ago · 8 km deep · 18 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10841218. Read Tue, Sep 22, 2026, 9:40 AM UTC.