M2.5 earthquake 7 km SE of Mossyrock, Washington
A magnitude 2.5 earthquake struck 7 km SE of Mossyrock, Washington on Tue, Sep 14, 1971, 6:31 AM PDT (13:31 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M3.3 18 km SSW of Packwood, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.5 (md), micro
- Local time
- UTC
- 1971-09-14 13:31:33 UTC
- Depth
- 11.3 km (7.0 mi), shallow
- Epicenter
- 46.477° N, 122.432° 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 22.0 km horizontally, 99.9 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- Operator assigned
- Station coverage gap
- 258°, poorly surrounded by stations
- Stations used
- 5
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
- 1.917 km E of Morton, Washington · 20077 days ago · 29 km deep · 31 km away
- 2.11 km WNW of Federal Way, Washington · 20071 days ago · 28 km deep · 95 km away
- 3.318 km SSW of Packwood, Washington · 20062 days ago · 0 km deep · 53 km away
- 1.72 km NNE of Bonney Lake, Washington · 20060 days ago · 10 km deep · 83 km away
Before
- 2.43 km E of Pacific, Washington · 20099 days ago · 14 km deep · 90 km away
- 2.14 km NE of Ashford, Washington · 20105 days ago · 9 km deep · 48 km away
- 2.55 km NE of Ashford, Washington · 20118 days ago · 8 km deep · 50 km away
- 2.032 km NNW of Trout Lake, Washington · 20122 days ago · -1 km deep · 62 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10839748. Read Tue, Sep 22, 2026, 9:35 PM UTC.