M1.5 earthquake 11 km ENE of Onalaska, Washington
A magnitude 1.5 earthquake struck 11 km ENE of Onalaska, Washington on Sun, Jun 11, 1978, 8:55 AM PDT (15:55 UTC), 12 km (7 mi) below the surface.
A larger quake followed: M1.6 7 km ESE of Mineral, 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
- 1978-06-11 15:55:09 UTC
- Depth
- 11.7 km (7.3 mi), shallow
- Epicenter
- 46.633° N, 122.591° 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 0.7 km horizontally, 1.7 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- Operator assigned
- Station coverage gap
- 186°, poorly surrounded by stations
- Stations used
- 9
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
- 1.67 km ESE of Mineral, Washington · 17614 days ago · 16 km deep · 38 km away
- 1.514 km NNE of Ashford, Washington · 17608 days ago · 3 km deep · 57 km away
- 1.6Washington · 17608 days ago · 3 km deep · 56 km away
- 1.66 km NE of Ashford, Washington · 17592 days ago · 12 km deep · 51 km away
- 1.514 km SSW of Clatskanie, Oregon · 17588 days ago · 31 km deep · 90 km away
- 1.611 km ENE of Onalaska, Washington · 17581 days ago · 17 km deep · 0 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10847213. Read Tue, Sep 22, 2026, 1:07 AM UTC.