M1.9 earthquake 13 km NNE of Hamilton, Washington
A magnitude 1.9 earthquake struck 13 km NNE of Hamilton, Washington on Fri, Aug 14, 1981, 5:02 AM PDT (12:02 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M2.4 4 km N of Deming, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (md), micro
- Local time
- UTC
- 1981-08-14 12:02:04 UTC
- Depth
- 10.7 km (6.7 mi), shallow
- Epicenter
- 48.635° N, 121.942° 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 2.7 km horizontally, 4.7 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 237°, poorly surrounded by stations
- Stations used
- 18
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 7 in the 30 days before it.
After
- 2.44 km N of Deming, Washington · 16475 days ago · 12 km deep · 33 km away
- 1.57 km WSW of Aldergrove, Canada · 16463 days ago · 37 km deep · 65 km away
- 1.87 km NNW of Deming, Washington · 16441 days ago · 12 km deep · 36 km away
- 1.919 km NNE of Index, Washington · 16440 days ago · 2 km deep · 79 km away
- 1.54 km ENE of Blaine, Washington · 16438 days ago · 10 km deep · 68 km away
- 1.77 km S of Oso, Washington · 16437 days ago · -1 km deep · 48 km away
Before
- 1.70 km NNE of Duvall, Washington · 16486 days ago · -1 km deep · 98 km away
- 2.16 km ENE of Deming, Washington · 16491 days ago · 3 km deep · 27 km away
- 1.93 km W of Fobes Hill, Washington · 16491 days ago · 14 km deep · 78 km away
- 2.15 km NW of Orcas, Washington · 16497 days ago · 16 km deep · 77 km away
- 1.8Washington · 16498 days ago · 7 km deep · 16 km away
- 2.04 km W of Darrington, Washington · 16504 days ago · 2 km deep · 48 km away
- 2.07 km E of Deming, Washington · 16505 days ago · 3 km deep · 26 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10128793. Read Wed, Sep 23, 2026, 3:47 PM UTC.