M3.3 earthquake 7 km NNW of Entiat, Washington
A magnitude 3.3 earthquake struck 7 km NNW of Entiat, Washington on Sun, Apr 16, 1978, 11:45 AM PST (19:45 UTC), 4 km (2 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (md), minor
- Local time
- UTC
- 1978-04-16 19:45:16 UTC
- Depth
- 4.0 km (2.5 mi), shallow
- Epicenter
- 47.737° N, 120.239° 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, 1.4 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 79°
- Stations used
- 16
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 5 in the 30 days before it.
After
- 1.72 km SE of Entiat, Washington · 17649 days ago · 4 km deep · 10 km away
- 1.69 km NNE of Waterville, Washington · 17641 days ago · 5 km deep · 16 km away
- 1.58 km W of Entiat, Washington · 17634 days ago · 0 km deep · 9 km away
Before
- 1.88 km WNW of Cascade Valley, Washington · 17695 days ago · 15 km deep · 89 km away
- 1.610 km W of Entiat, Washington · 17695 days ago · 0 km deep · 11 km away
- 1.711 km S of Ellensburg, Washington · 17703 days ago · 23 km deep · 96 km away
- 1.815 km NE of Bridgeport, Washington · 17716 days ago · 11 km deep · 68 km away
- 3.317 km NE of Bridgeport, Washington · 17716 days ago · 12 km deep · 69 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10846558. Read Tue, Sep 22, 2026, 7:43 AM UTC.