M1.9 earthquake 23 km N of Marblemount, Washington
A magnitude 1.9 earthquake struck 23 km N of Marblemount, Washington on Sat, Aug 26, 1978, 3:12 AM PDT (10:12 UTC), 1 km (1 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (md), micro
- Local time
- UTC
- 1978-08-26 10:12:01 UTC
- Depth
- 1.0 km (0.6 mi), shallow
- Epicenter
- 48.740° N, 121.475° 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 1.5 km horizontally, 1.7 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- Operator assigned
- Station coverage gap
- 271°, poorly surrounded by stations
- Stations used
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10847773. Read Tue, Sep 29, 2026, 7:43 PM UTC.