M6.7 earthquake 4 km WNW of Roy, Washington
A magnitude 6.7 earthquake struck 4 km WNW of Roy, Washington on Wed, Apr 13, 1949, 11:55 AM GMT-8 (19:55 UTC), 50 km (31 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.7 (mw), strong
- Local time
- UTC
- 1949-04-13 19:55:43 UTC
- Depth
- 50.0 km (31.1 mi), shallow
- Epicenter
- 47.014° N, 122.597° W
- Region
- Washington
- Felt reports
- 83
- Strongest shaking
- VII, very strong shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VII, very strong shaking
- Peak ground acceleration
- 24.5% of gravity
- Peak ground velocity
- 3.2 cm/s
- Map
- Automatic
Did you feel it?
83 people reported to the USGS what they felt; the strongest reported shaking was VIII, severe shaking.
How well it is located
Reviewed by a seismologist.
- Magnitude uncertainty
- ±0.30
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem896466 (also filed as uuolympi49, ushis1657). Read Mon, Sep 21, 2026, 3:14 PM UTC.