M1.7 earthquake 34 km SSE of Morton, Washington
A magnitude 1.7 earthquake struck 34 km SSE of Morton, Washington on Mon, Oct 22, 1973, 11:39 PM PDT (06:39 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M2.8 12 km NE of Ashford, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.7 (md), micro
- Local time
- UTC
- 1973-10-23 06:39:41 UTC
- Depth
- 6.3 km (3.9 mi), shallow
- Epicenter
- 46.278° N, 122.073° 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 3.3 km horizontally, 5.4 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- From location
- Station coverage gap
- 209°, poorly surrounded by stations
- Stations used
- 4
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 2 in the 30 days before it.
After
- 1.925 km ENE of Packwood, Washington · 19293 days ago · 4 km deep · 70 km away
- 2.415 km NE of Ashford, Washington · 19291 days ago · 4 km deep · 67 km away
- 1.85 km SSE of Mossyrock, Washington · 19289 days ago · 8 km deep · 37 km away
- 1.839 km SSE of Morton, Washington · 19286 days ago · 10 km deep · 9 km away
- 2.812 km NE of Ashford, Washington · 19285 days ago · 8 km deep · 64 km away
- 1.618 km SSW of Nile, Washington · 19283 days ago · 23 km deep · 89 km away
- 2.518 km E of Packwood, Washington · 19274 days ago · 3 km deep · 62 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10857618. Read Tue, Sep 29, 2026, 2:12 AM UTC.