M1.7 earthquake 9 km NNW of Marblemount, Washington
A magnitude 1.7 earthquake struck 9 km NNW of Marblemount, Washington on Thu, Sep 10, 1987, 5:54 PM PDT (00:54 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.4 1 km E of Ferndale, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.7 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1987-09-11 00:54:14 UTC
- Depth
- -0.2 km (-0.1 mi), shallow
- Epicenter
- 48.603° N, 121.517° 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, 0.8 km in depth
- Magnitude uncertainty
- ±0.08
- Depth from
- Operator assigned
- Station coverage gap
- 195°, poorly surrounded by stations
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 7 in the 30 days before it.
After
- 1.816 km SE of Glacier, Washington · 14263 days ago · 25 km deep · 28 km away
- 2.041 km W of Winthrop, Washington · 14249 days ago · 4 km deep · 61 km away
- 1.98 km SSE of Sultan, Washington · 14240 days ago · 14 km deep · 92 km away
- 1.713 km WNW of Chilliwack, Canada · 14217 days ago · -1 km deep · 80 km away
- 1.99 km NNW of Ault Field, Washington · 14216 days ago · 52 km deep · 91 km away
- 1.632 km SE of Darrington, Washington · 14210 days ago · 14 km deep · 62 km away
- 2.055 km ESE of Darrington, Washington · 14210 days ago · 0 km deep · 70 km away
- 2.41 km E of Ferndale, Washington · 14208 days ago · 18 km deep · 81 km away
- 1.56 km ENE of Verlot, Washington · 14207 days ago · 14 km deep · 56 km away
Before
- 1.710 km NW of Marblemount, Washington · 14267 days ago · -1 km deep · 1 km away
- 1.736 km NE of Skykomish, Washington · 14273 days ago · 0 km deep · 81 km away
- 2.136 km NE of Skykomish, Washington · 14273 days ago · 0 km deep · 81 km away
- 1.96 km SSE of Concrete, Washington · 14278 days ago · 2 km deep · 19 km away
- 2.02 km WSW of Birch Bay, Washington · 14279 days ago · 15 km deep · 98 km away
- 2.457 km SE of Hope, Canada · 14279 days ago · 34 km deep · 58 km away
- 1.72 km SSW of Birch Bay, Washington · 14286 days ago · 13 km deep · 96 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10223103. Read Thu, Oct 1, 2026, 2:58 PM UTC.