M1.9 earthquake 13 km W of Quilcene, Washington
A magnitude 1.9 earthquake struck 13 km W of Quilcene, Washington on Thu, Feb 27, 1975, 6:45 PM PDT (01:45 UTC), 27 km (17 mi) below the surface.
A larger quake followed: M2.1 8 km WSW of Lofall, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (md), micro
- Local time
- UTC
- 1975-02-28 01:45:01 UTC
- Depth
- 26.7 km (16.6 mi), shallow
- Epicenter
- 47.830° N, 123.054° 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 3.4 km horizontally, 1.4 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- From location
- Station coverage gap
- 222°, poorly surrounded by stations
- Stations used
- 4
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 5 in the 30 days before it.
After
- 2.18 km WSW of Lofall, Washington · 18823 days ago · 19 km deep · 22 km away
- 2.0Washington · 18823 days ago · 10 km deep · 80 km away
- 2.83 km NW of Black Diamond, Washington · 18815 days ago · 20 km deep · 95 km away
- 2.13 km NE of Dash Point, Washington · 18804 days ago · 14 km deep · 74 km away
- 1.88 km W of Longbranch, Washington · 18803 days ago · 8 km deep · 72 km away
- 2.22 km NNE of Riverton, Washington · 18802 days ago · 25 km deep · 68 km away
- 4.010 km SSW of Seabeck, Washington · 18787 days ago · 40 km deep · 33 km away
- 4.22 km SW of DuPont, Washington · 18781 days ago · 45 km deep · 89 km away
Before
- 1.54 km NW of Wauna, Washington · 18835 days ago · 23 km deep · 55 km away
- 1.75 km NNE of Vaughn, Washington · 18842 days ago · 22 km deep · 54 km away
- 2.01 km WSW of Mirrormont, Washington · 18857 days ago · 14 km deep · 88 km away
- 1.81 km WNW of Snoqualmie, Washington · 18858 days ago · 15 km deep · 96 km away
- 1.92 km NW of Redmond, Washington · 18862 days ago · 7 km deep · 70 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10860478. Read Tue, Sep 22, 2026, 8:45 PM UTC.