M1.9 earthquake 9 km SSE of Mossyrock, Washington
A magnitude 1.9 earthquake struck 9 km SSE of Mossyrock, Washington on Mon, Sep 10, 1973, 8:02 PM PDT (03:02 UTC), 9 km (6 mi) below the surface.
A larger quake followed: M2.2 12 km SSE of Mossyrock, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (md), micro
- Local time
- UTC
- 1973-09-11 03:02:37 UTC
- Depth
- 9.2 km (5.7 mi), shallow
- Epicenter
- 46.451° N, 122.424° 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 1.2 km horizontally, 7.2 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- From location
- Station coverage gap
- 163°
- 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: 6 in the 60 days after this one and 5 in the 30 days before it.
After
- 1.62 km NNE of Dash Point, Washington · 19368 days ago · 4 km deep · 99 km away
- 2.212 km SSE of Mossyrock, Washington · 19366 days ago · 11 km deep · 2 km away
- 2.214 km NNE of Ashford, Washington · 19356 days ago · 7 km deep · 60 km away
- 1.616 km ESE of Ashford, Washington · 19347 days ago · 11 km deep · 53 km away
- 1.734 km SSE of Morton, Washington · 19327 days ago · 6 km deep · 33 km away
- 1.61 km WNW of Puyallup, Washington · 19317 days ago · 23 km deep · 82 km away
Before
- 1.910 km NNW of Packwood, Washington · 19371 days ago · 2 km deep · 59 km away
- 2.438 km NNE of Amboy, Washington · 19375 days ago · 8 km deep · 32 km away
- 1.827 km NNE of Amboy, Washington · 19380 days ago · 10 km deep · 34 km away
- 2.712 km S of Morton, Washington · 19386 days ago · 11 km deep · 13 km away
- 1.913 km ENE of Ashford, Washington · 19389 days ago · 8 km deep · 57 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10857018. Read Tue, Sep 22, 2026, 10:58 AM UTC.