M1.6 earthquake 21 km S of Morton, Washington
A magnitude 1.6 earthquake struck 21 km S of Morton, Washington on Wed, Dec 1, 1999, 4:14 PM PST (00:14 UTC), 7 km (4 mi) below the surface.
A larger quake followed: M2.2 Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.6 (md), micro
- Local time
- UTC
- 1999-12-02 00:14:56 UTC
- Depth
- 6.9 km (4.3 mi), shallow
- Epicenter
- 46.371° N, 122.238° 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, 0.4 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 46°
- Stations used
- 32
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 0 in the 30 days before it.
After
- 2.113 km W of Greenwater, Washington · 9793 days ago · 14 km deep · 94 km away
- 1.67 km N of Amboy, Washington · 9783 days ago · 15 km deep · 47 km away
- 2.2Washington · 9780 days ago · 17 km deep · 92 km away
- 1.6Washington-Oregon border region · 9779 days ago · 8 km deep · 59 km away
- 1.92 km NNE of Bonney Lake, Washington · 9779 days ago · 14 km deep · 92 km away
- 1.6Washington · 9776 days ago · 1 km deep · 52 km away
- 2.019 km NNE of Ashford, Washington · 9776 days ago · 12 km deep · 65 km away
- 1.837 km SSE of Morton, Washington · 9775 days ago · 11 km deep · 19 km away
- 1.614 km SSE of Carbonado, Washington · 9774 days ago · 12 km deep · 69 km away
- 1.512 km NE of Woodland, Washington · 9763 days ago · 11 km deep · 53 km away
- 1.93 km ENE of Bonney Lake, Washington · 9751 days ago · 14 km deep · 92 km away
- 2.122 km ENE of Ashford, Washington · 9742 days ago · -1 km deep · 64 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10483498. Read Tue, Sep 29, 2026, 4:16 PM UTC.