M1.7 earthquake 15 km SSW of Morton, Washington
A magnitude 1.7 earthquake struck 15 km SSW of Morton, Washington on Wed, Oct 22, 2003, 12:59 AM PDT (07:59 UTC), 18 km (11 mi) below the surface.
A larger quake followed: M2.1 2 km SSW of Black Diamond, 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, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 2003-10-22 07:59:58 UTC
- Depth
- 17.8 km (11.1 mi), shallow
- Epicenter
- 46.431° N, 122.346° 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 0.5 km horizontally, 0.7 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 54°
- Stations used
- 26
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 6 in the 30 days before it.
After
- 1.622 km S of Packwood, Washington · 8359 days ago · 1 km deep · 56 km away
- 1.537 km NNE of Amboy, Washington · 8357 days ago · 0 km deep · 28 km away
- 1.514 km NNE of Ashford, Washington · 8342 days ago · 9 km deep · 58 km away
- 1.813 km E of Wilkeson, Washington · 8336 days ago · 17 km deep · 84 km away
- 2.12 km SSW of Black Diamond, Washington · 8328 days ago · 19 km deep · 99 km away
- 1.82 km SW of Packwood, Washington · 8328 days ago · 4 km deep · 53 km away
Before
- 1.543 km WNW of Trout Lake, Washington · 8382 days ago · 7 km deep · 37 km away
- 1.65 km WSW of Deer Island, Oregon · 8388 days ago · 22 km deep · 72 km away
- 1.710 km SSE of Mineral, Washington · 8395 days ago · 16 km deep · 27 km away
- 2.024 km E of Castle Rock, Washington · 8400 days ago · 18 km deep · 29 km away
- 1.66 km NNE of North Plains, Oregon · 8403 days ago · 6 km deep · 99 km away
- 1.94 km WNW of North Portland, Oregon · 8409 days ago · 16 km deep · 94 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10600898. Read Fri, Oct 2, 2026, 1:45 AM UTC.