M1.5 earthquake 16 km S of Morton, Washington
A magnitude 1.5 earthquake struck 16 km S of Morton, Washington on Thu, Aug 2, 1979, 5:22 PM PDT (00:22 UTC), 20 km (13 mi) below the surface.
A larger quake followed: M1.7 14 km S of Packwood, 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
- 1979-08-03 00:22:54 UTC
- Depth
- 20.3 km (12.6 mi), shallow
- Epicenter
- 46.408° N, 122.314° 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 0.8 km horizontally, 2.3 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 125°
- Stations used
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 8 in the 30 days before it.
After
- 1.714 km S of Packwood, Washington · 17183 days ago · 2 km deep · 48 km away
- 1.9Washington · 17180 days ago · 10 km deep · 9 km away
- 1.68 km SW of Morton, Washington · 17169 days ago · 20 km deep · 11 km away
Before
- 1.9Washington · 17220 days ago · 26 km deep · 56 km away
- 1.728 km S of Morton, Washington · 17226 days ago · 5 km deep · 14 km away
- 1.710 km WNW of North Portland, Oregon · 17235 days ago · 13 km deep · 93 km away
- 1.69 km SSW of Morton, Washington · 17242 days ago · 19 km deep · 8 km away
- 1.810 km SSW of Morton, Washington · 17242 days ago · 19 km deep · 8 km away
- 1.99 km SSW of Morton, Washington · 17243 days ago · 20 km deep · 7 km away
- 2.710 km SSW of Morton, Washington · 17243 days ago · 22 km deep · 6 km away
- 3.69 km SSW of Morton, Washington · 17243 days ago · 20 km deep · 7 km away
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10850378. Read Tue, Sep 22, 2026, 7:23 AM UTC.