M2.1 earthquake 4 km SW of Hamilton, Washington
A magnitude 2.1 earthquake struck 4 km SW of Hamilton, Washington on Sun, Dec 15, 1974, 10:06 AM PST (18:06 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.8 5 km WSW of Mount Vernon, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.1 (md), micro
- Local time
- UTC
- 1974-12-15 18:06:59 UTC
- Depth
- -0.4 km (-0.3 mi), shallow
- Epicenter
- 48.497° N, 122.030° 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 2.2 km horizontally, 9.6 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- From location
- Station coverage gap
- 150°
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 7 in the 30 days before it.
After
- 2.52 km SW of Kenmore, Washington · 18895 days ago · 15 km deep · 86 km away
- 2.85 km WSW of Mount Vernon, Washington · 18893 days ago · 19 km deep · 29 km away
- 2.34 km S of Anacortes, Washington · 18885 days ago · 45 km deep · 42 km away
- 1.92 km NW of Redmond, Washington · 18868 days ago · 7 km deep · 90 km away
Before
- 3.13 km SSW of Lyman, Washington · 18916 days ago · 1 km deep · 4 km away
- 2.83 km SW of Hamilton, Washington · 18916 days ago · 1 km deep · 0 km away
- 1.84 km E of Big Lake, Washington · 18923 days ago · 19 km deep · 15 km away
- 1.80 km W of Fobes Hill, Washington · 18934 days ago · 9 km deep · 61 km away
- 1.94 km ESE of Cathcart, Washington · 18944 days ago · 16 km deep · 73 km away
- 1.511 km N of Quilcene, Washington · 18945 days ago · 23 km deep · 88 km away
- 1.51 km W of Monroe, Washington · 18946 days ago · -1 km deep · 71 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10860163 (also filed as usp000094p). Read Tue, Sep 29, 2026, 11:44 AM UTC.