M1.9 earthquake 7 km ESE of Marblemount, Washington
A magnitude 1.9 earthquake struck 7 km ESE of Marblemount, Washington on Tue, Nov 6, 1990, 12:39 AM PST (08:39 UTC), -1 km (-1 mi) below the surface.
A larger quake followed: M2.6 18 km NNE of Hamilton, 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, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1990-11-06 08:39:09 UTC
- Depth
- -1.0 km (-0.6 mi), shallow
- Epicenter
- 48.513° N, 121.355° 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 0.3 km horizontally, 1.0 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- Operator assigned
- Station coverage gap
- 169°
- Stations used
- 16
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 1 in the 30 days before it.
After
- 2.029 km SSE of Agassiz, Canada · 13115 days ago · 1 km deep · 57 km away
- 1.616 km E of Verlot, Washington · 13111 days ago · 1 km deep · 51 km away
- 2.618 km NNE of Hamilton, Washington · 13100 days ago · -1 km deep · 46 km away
- 1.71 km W of Mount Vernon, Washington · 13076 days ago · 7 km deep · 75 km away
- 1.510 km SSE of Skykomish, Washington · 13065 days ago · 1 km deep · 99 km away
- 2.66 km SW of Deming, Washington · 13065 days ago · -1 km deep · 74 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10266393. Read Sun, Oct 4, 2026, 6:21 AM UTC.