M2.2 earthquake 3 km N of Hamilton, Washington
A magnitude 2.2 earthquake struck 3 km N of Hamilton, Washington on Mon, Sep 29, 1986, 12:37 PM PDT (19:37 UTC), -1 km (0 mi) below the surface.
A larger quake followed: M2.3 20 km SSE of Marblemount, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.2 (md), micro
- Local time
- UTC
- 1986-09-29 19:37:06 UTC
- Depth
- -0.7 km (-0.4 mi), shallow
- Epicenter
- 48.551° N, 121.983° 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 0.8 km horizontally, 1.3 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 94°
- Stations used
- 17
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 10 in the 30 days before it.
After
- 1.72 km E of Kirkland, Washington · 14601 days ago · 14 km deep · 98 km away
- 2.215 km ESE of Acme, Washington · 14600 days ago · -1 km deep · 15 km away
- 2.320 km SSE of Marblemount, Washington · 14593 days ago · 9 km deep · 51 km away
- 1.53 km NNW of Custer, Washington · 14579 days ago · 6 km deep · 66 km away
- 1.617 km ESE of Verlot, Washington · 14574 days ago · 7 km deep · 63 km away
- 1.510 km NW of Marblemount, Washington · 14545 days ago · 0 km deep · 33 km away
Before
- 2.43 km N of Hamilton, Washington · 14606 days ago · -1 km deep · 0 km away
- 2.417 km ESE of Verlot, Washington · 14616 days ago · 7 km deep · 63 km away
- 2.820 km E of Verlot, Washington · 14616 days ago · 5 km deep · 64 km away
- 1.64 km SW of Darrington, Washington · 14616 days ago · 1 km deep · 45 km away
- 2.3Puget Sound region, Washington · 14626 days ago · 13 km deep · 93 km away
- 2.4Washington-British Columbia border region · 14627 days ago · 48 km deep · 96 km away
- 1.60 km S of Oak Harbor, Washington · 14628 days ago · 19 km deep · 57 km away
- 2.317 km E of Verlot, Washington · 14630 days ago · 6 km deep · 63 km away
- 1.514 km ESE of Verlot, Washington · 14631 days ago · 9 km deep · 62 km away
- 1.8Washington · 14631 days ago · -1 km deep · 65 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10213583. Read Tue, Sep 22, 2026, 9:25 PM UTC.