M2.9 earthquake 31 km NE of Amboy, Washington
A magnitude 2.9 earthquake struck 31 km NE of Amboy, Washington on Sun, May 22, 1977, 1:35 AM PDT (08:35 UTC), 13 km (8 mi) below the surface.
A larger quake followed: M3.0 6 km SSW of Morton, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.9 (md), micro
- Local time
- UTC
- 1977-05-22 08:35:16 UTC
- Depth
- 12.6 km (7.8 mi), shallow
- Epicenter
- 46.076° N, 122.120° 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 4.9 km horizontally, 4.2 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- From location
- Station coverage gap
- 278°, poorly surrounded by stations
- Stations used
- 6
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 3 in the 30 days before it.
After
- 3.06 km SSW of Morton, Washington · 18013 days ago · 24 km deep · 50 km away
- 2.69 km SSW of Morton, Washington · 18005 days ago · 0 km deep · 48 km away
- 2.47 km SE of Mineral, Washington · 17993 days ago · 16 km deep · 66 km away
- 2.427 km SSE of Morton, Washington · 17991 days ago · 8 km deep · 28 km away
- 2.221 km ENE of Packwood, Washington · 17989 days ago · 2 km deep · 87 km away
- 2.529 km NE of Yacolt, Washington · 17986 days ago · 0 km deep · 5 km away
- 2.717 km S of Mossyrock, Washington · 17968 days ago · 14 km deep · 43 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10843728. Read Tue, Sep 22, 2026, 9:36 PM UTC.