M1.8 earthquake 37 km SSE of Morton, Washington
A magnitude 1.8 earthquake struck 37 km SSE of Morton, Washington on Sat, Dec 25, 1999, 10:13 AM PST (18:13 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M2.4 35 km NE 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), micro
- Local time
- UTC
- 1999-12-25 18:13:27 UTC
- Depth
- 11.1 km (6.9 mi), shallow
- Epicenter
- 46.256° N, 122.053° 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 0.3 km horizontally, 0.6 km in depth
- Magnitude uncertainty
- ±0.03
- Depth from
- From location
- Station coverage gap
- 62°
- Stations used
- 31
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
- 1.614 km SSE of Carbonado, Washington · 9775 days ago · 12 km deep · 79 km away
- 1.512 km NE of Woodland, Washington · 9764 days ago · 11 km deep · 53 km away
- 2.122 km ENE of Ashford, Washington · 9743 days ago · -1 km deep · 70 km away
- 1.711 km SSE of Mineral, Washington · 9737 days ago · 18 km deep · 41 km away
- 1.96 km SSW of Morton, Washington · 9718 days ago · 20 km deep · 34 km away
- 2.435 km NE of Amboy, Washington · 9717 days ago · 10 km deep · 14 km away
Before
- 2.019 km NNE of Ashford, Washington · 9776 days ago · 12 km deep · 74 km away
- 1.6Washington · 9777 days ago · 1 km deep · 60 km away
- 1.6Washington-Oregon border region · 9779 days ago · 8 km deep · 59 km away
- 1.67 km N of Amboy, Washington · 9784 days ago · 15 km deep · 44 km away
- 1.621 km S of Morton, Washington · 9799 days ago · 7 km deep · 19 km away
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10488848. Read Wed, Sep 30, 2026, 8:17 AM UTC.