M2.1 earthquake 8 km WSW of Lofall, Washington
A magnitude 2.1 earthquake struck 8 km WSW of Lofall, Washington on Tue, Mar 11, 1975, 8:42 PM PDT (03:42 UTC), 19 km (12 mi) below the surface.
A larger quake followed: M4.2 2 km SW of DuPont, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.1 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1975-03-12 03:42:33 UTC
- Depth
- 19.2 km (11.9 mi), shallow
- Epicenter
- 47.796° N, 122.767° 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 1.5 km horizontally, 1.7 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- From location
- Station coverage gap
- 143°
- Stations used
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 4 in the 30 days before it.
After
- 2.0Washington · 18832 days ago · 10 km deep · 72 km away
- 2.83 km NW of Black Diamond, Washington · 18824 days ago · 20 km deep · 76 km away
- 2.13 km NE of Dash Point, Washington · 18814 days ago · 14 km deep · 58 km away
- 1.88 km W of Longbranch, Washington · 18812 days ago · 8 km deep · 67 km away
- 2.22 km NNE of Riverton, Washington · 18811 days ago · 25 km deep · 49 km away
- 2.72 km WSW of Hamilton, Washington · 18804 days ago · -1 km deep · 97 km away
- 4.010 km SSW of Seabeck, Washington · 18796 days ago · 40 km deep · 29 km away
- 4.22 km SW of DuPont, Washington · 18790 days ago · 45 km deep · 80 km away
- 2.05 km NNE of Startup, Washington · 18780 days ago · 26 km deep · 80 km away
Before
- 2.05 km SW of Wilderness Rim, Washington · 18840 days ago · 19 km deep · 83 km away
- 1.913 km W of Quilcene, Washington · 18844 days ago · 27 km deep · 22 km away
- 1.54 km NW of Wauna, Washington · 18845 days ago · 23 km deep · 44 km away
- 1.75 km NNE of Vaughn, Washington · 18851 days ago · 22 km deep · 44 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10860508. Read Fri, Oct 2, 2026, 4:32 AM UTC.