M1.5 earthquake 7 km SSE of Hamilton, Washington
A magnitude 1.5 earthquake struck 7 km SSE of Hamilton, Washington on Fri, Jan 23, 1987, 11:11 PM PST (07:11 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M1.6 18 km NNW of Orcas, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.5 (md), micro
- Local time
- UTC
- 1987-01-24 07:11:20 UTC
- Depth
- 11.3 km (7.0 mi), shallow
- Epicenter
- 48.462° N, 121.931° 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 0.4 km horizontally, 1.0 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 110°
- 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: 5 in the 60 days after this one and 9 in the 30 days before it.
After
- 1.618 km NNW of Orcas, Washington · 14476 days ago · 53 km deep · 88 km away
- 2.83 km SW of Swede Heaven, Washington · 14434 days ago · 3 km deep · 26 km away
- 1.50 km SSW of Echo Lake, Washington · 14433 days ago · 21 km deep · 76 km away
- 2.13 km SSW of Swede Heaven, Washington · 14431 days ago · 3 km deep · 27 km away
- 1.77 km SSW of Bellingham, Washington · 14428 days ago · 13 km deep · 50 km away
Before
- 1.50 km ENE of Esperance, Washington · 14490 days ago · 22 km deep · 81 km away
- 1.64 km WNW of Edmonds, Washington · 14495 days ago · 18 km deep · 81 km away
- 2.75 km WNW of Edmonds, Washington · 14495 days ago · 19 km deep · 80 km away
- 2.02 km SE of Woods Creek, Washington · 14500 days ago · 18 km deep · 67 km away
- 1.88 km SE of Hamilton, Washington · 14505 days ago · 7 km deep · 0 km away
- 2.019 km SSE of Marblemount, Washington · 14511 days ago · 9 km deep · 43 km away
- 1.95 km NW of Orcas, Washington · 14514 days ago · 15 km deep · 80 km away
- 2.01 km W of Kingsgate, Washington · 14514 days ago · 15 km deep · 84 km away
- 1.93 km NW of Geneva, Washington · 14514 days ago · 17 km deep · 50 km away
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10216378. Read Tue, Sep 22, 2026, 6:06 AM UTC.