M3.0 earthquake 29 km S of Morton, Washington
A magnitude 3.0 earthquake struck 29 km S of Morton, Washington on Sat, Apr 7, 1973, 1:06 PM PST (21:06 UTC), 16 km (10 mi) below the surface.
A larger quake followed: M3.4 29 km S of Morton, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.0 (md), minor
- Local time
- UTC
- 1973-04-07 21:06:45 UTC
- Depth
- 15.5 km (9.6 mi), shallow
- Epicenter
- 46.294° N, 122.204° 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 1.9 km horizontally, 2.4 km in depth
- Magnitude uncertainty
- ±0.18
- Depth from
- Operator assigned
- Station coverage gap
- 285°, poorly surrounded by stations
- Stations used
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 5 in the 30 days before it.
After
- 2.110 km SE of Mineral, Washington · 19524 days ago · 26 km deep · 39 km away
- 2.414 km NNE of Ashford, Washington · 19518 days ago · 1 km deep · 68 km away
- 3.429 km S of Morton, Washington · 19513 days ago · 13 km deep · 1 km away
- 2.62 km SSE of DuPont, Washington · 19509 days ago · 26 km deep · 92 km away
- 2.615 km NNE of Ashford, Washington · 19503 days ago · 6 km deep · 69 km away
- 2.516 km SSW of Packwood, Washington · 19490 days ago · -2 km deep · 42 km away
- 2.18 km ENE of Kalama, Washington · 19482 days ago · 13 km deep · 50 km away
- 1.833 km NE of Amboy, Washington · 19477 days ago · 8 km deep · 19 km away
- 2.812 km E of Wilkeson, Washington · 19474 days ago · 17 km deep · 93 km away
- 2.036 km SSE of Morton, Washington · 19469 days ago · 6 km deep · 8 km away
Before
- 1.722 km ENE of Kalama, Washington · 19527 days ago · 32 km deep · 36 km away
- 1.93 km ENE of McKenna, Washington · 19538 days ago · 31 km deep · 76 km away
- 2.142 km NE of Amboy, Washington · 19549 days ago · 2 km deep · 18 km away
- 2.212 km NE of Ashford, Washington · 19550 days ago · 6 km deep · 65 km away
- 1.76 km SE of Mineral, Washington · 19555 days ago · 16 km deep · 42 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10840163. Read Tue, Sep 22, 2026, 3:53 AM UTC.