M1.6 earthquake 11 km S of Bridgeport, Washington
A magnitude 1.6 earthquake struck 11 km S of Bridgeport, Washington on Sun, Sep 24, 1978, 7:02 AM PDT (14:02 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M3.1 10 km NNW of Mansfield, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.6 (md), micro
- Local time
- UTC
- 1978-09-24 14:02:17 UTC
- Depth
- 5.4 km (3.3 mi), shallow
- Epicenter
- 47.908° N, 119.682° 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 0.5 km horizontally, 1.6 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 72°
- 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: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10847948. Read Tue, Sep 22, 2026, 8:43 PM UTC.