M1.6 earthquake 32 km S of Morton, Washington
A magnitude 1.6 earthquake struck 32 km S of Morton, Washington on Fri, May 25, 1979, 5:47 PM PDT (00:47 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.6 9 km SSW of Morton, 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
- 1979-05-26 00:47:58 UTC
- Depth
- 9.9 km (6.1 mi), shallow
- Epicenter
- 46.267° N, 122.299° 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 9.6 km horizontally, 16.0 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- Operator assigned
- Station coverage gap
- 139°
- Stations used
- 6
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 4 in the 30 days before it.
After
- 3.69 km SSW of Morton, Washington · 17244 days ago · 20 km deep · 23 km away
- 2.710 km SSW of Morton, Washington · 17244 days ago · 22 km deep · 22 km away
- 1.99 km SSW of Morton, Washington · 17243 days ago · 20 km deep · 23 km away
- 1.810 km SSW of Morton, Washington · 17243 days ago · 19 km deep · 23 km away
- 1.69 km SSW of Morton, Washington · 17242 days ago · 19 km deep · 24 km away
- 1.710 km WNW of North Portland, Oregon · 17235 days ago · 13 km deep · 79 km away
Before
- 1.717 km N of Mossyrock, Washington · 17287 days ago · -1 km deep · 48 km away
- 2.216 km N of Mossyrock, Washington · 17291 days ago · 8 km deep · 47 km away
- 2.26 km SE of Kelso, WA · 17296 days ago · 27 km deep · 45 km away
- 2.018 km ESE of Carbonado, Washington · 17316 days ago · 13 km deep · 88 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10849843. Read Tue, Sep 22, 2026, 8:25 PM UTC.