M1.9 earthquake 15 km WSW of Alder, Washington
A magnitude 1.9 earthquake struck 15 km WSW of Alder, Washington on Mon, Nov 6, 1978, 11:51 AM PST (19:51 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M3.4 Olympic Peninsula, 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, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1978-11-06 19:51:57 UTC
- Depth
- 11.4 km (7.1 mi), shallow
- Epicenter
- 46.745° N, 122.473° 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 0.0 km horizontally, 0.2 km in depth
- Magnitude uncertainty
- ±0.08
- Depth from
- Operator assigned
- Station coverage gap
- 133°
- Stations used
- 9
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
- 2.016 km NNE of Ashford, Washington · 17484 days ago · 8 km deep · 43 km away
- 2.08 km WNW of Belfair, Washington · 17484 days ago · 13 km deep · 89 km away
- 1.6Puget Sound region, Washington · 17474 days ago · 23 km deep · 86 km away
- 2.413 km NE of Hoodsport, Washington · 17472 days ago · 15 km deep · 94 km away
- 1.612 km NW of Morton, Washington · 17452 days ago · 9 km deep · 14 km away
- 3.4Olympic Peninsula, Washington · 17446 days ago · 40 km deep · 81 km away
Before
- 1.61 km WSW of Auburn, Washington · 17519 days ago · 10 km deep · 65 km away
- 1.62 km ENE of Dash Point, Washington · 17519 days ago · 24 km deep · 65 km away
- 1.98 km ESE of Kapowsin, Washington · 17519 days ago · 1 km deep · 35 km away
- 1.510 km NE of Ashford, Washington · 17526 days ago · 8 km deep · 43 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10848318. Read Sat, Oct 3, 2026, 10:06 PM UTC.