M1.8 earthquake 22 km S of Morton, Washington
A magnitude 1.8 earthquake struck 22 km S of Morton, Washington on Thu, Dec 25, 2003, 11:42 AM PST (19:42 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M2.3 37 km NNE of Amboy, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.8 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 2003-12-25 19:42:29 UTC
- Depth
- 6.1 km (3.8 mi), shallow
- Epicenter
- 46.362° N, 122.235° 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 0.4 km horizontally, 0.5 km in depth
- Magnitude uncertainty
- ±0.03
- Depth from
- From location
- Station coverage gap
- 81°
- Stations used
- 21
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 4 in the 30 days before it.
After
- 2.337 km NNE of Amboy, Washington · 8312 days ago · 0 km deep · 18 km away
- 2.15 km WNW of North Portland, Oregon · 8301 days ago · 17 km deep · 91 km away
- 2.019 km NNE of Ashford, Washington · 8295 days ago · 12 km deep · 66 km away
- 2.023 km ENE of Ashford, Washington · 8291 days ago · 1 km deep · 65 km away
- 1.815 km ENE of Kalama, Washington · 8290 days ago · 8 km deep · 48 km away
- 1.80 km NNW of Orting, Washington · 8284 days ago · 11 km deep · 82 km away
- 1.72 km E of Waller, Washington · 8284 days ago · 19 km deep · 93 km away
Before
- 1.838 km NNE of Amboy, Washington · 8318 days ago · 0 km deep · 18 km away
- 1.82 km SW of Packwood, Washington · 8328 days ago · 4 km deep · 48 km away
- 1.813 km E of Wilkeson, Washington · 8336 days ago · 17 km deep · 87 km away
- 1.514 km NNE of Ashford, Washington · 8342 days ago · 9 km deep · 61 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10593108. Read Thu, Oct 1, 2026, 5:44 PM UTC.