M1.5 earthquake 3 km ENE of Carlsborg, Washington
A magnitude 1.5 earthquake struck 3 km ENE of Carlsborg, Washington on Wed, Jul 4, 1979, 2:27 PM PDT (21:27 UTC), 47 km (29 mi) below the surface.
A larger quake followed: M1.9 7 km SE of Hamilton, 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
- 1979-07-04 21:27:08 UTC
- Depth
- 46.9 km (29.2 mi), shallow
- Epicenter
- 48.106° N, 123.130° 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 1.2 km horizontally, 1.5 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 143°
- 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: 12 in the 60 days after this one and 4 in the 30 days before it.
After
- 1.97 km SE of Hamilton, Washington · 17245 days ago · 4 km deep · 100 km away
- 1.57 km NW of Ault Field, Washington · 17242 days ago · 12 km deep · 43 km away
- 2.36 km W of Burley, Washington · 17241 days ago · 23 km deep · 82 km away
- 1.610 km NE of Hoodsport, Washington · 17238 days ago · -1 km deep · 70 km away
- 1.90 km SE of Union Hill-Novelty Hill, Washington · 17232 days ago · 18 km deep · 96 km away
- 1.910 km NW of Orcas, Washington · 17231 days ago · 9 km deep · 62 km away
- 1.53 km NE of Lake Ketchum, Washington · 17230 days ago · 2 km deep · 64 km away
- 1.53 km N of Union Hill-Novelty Hill, Washington · 17223 days ago · 21 km deep · 93 km away
- 2.33 km WSW of Snohomish, Washington · 17221 days ago · 23 km deep · 77 km away
- 1.83 km ENE of Eastmont, Washington · 17221 days ago · 23 km deep · 77 km away
- 1.5Washington · 17212 days ago · 13 km deep · 28 km away
- 2.76 km N of Jamestown, Washington · 17206 days ago · 50 km deep · 10 km away
Before
- 1.51 km NNW of Lofall, Washington · 17249 days ago · 20 km deep · 46 km away
- 2.56 km S of Vashon, Washington · 17254 days ago · 48 km deep · 95 km away
- 1.715 km SSE of Friday Harbor, Washington · 17260 days ago · 47 km deep · 35 km away
- 1.62 km NW of Anacortes, Washington · 17269 days ago · 16 km deep · 59 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10850133. Read Tue, Sep 22, 2026, 8:21 PM UTC.