Washington earthquakes

M2.5 earthquake 4 km WSW of Onalaska, Washington

A magnitude 2.5 earthquake struck 4 km WSW of Onalaska, Washington on Sun, Mar 6, 1977, 3:01 AM PST (11:01 UTC), 28 km (17 mi) below the surface.

A larger quake followed: M2.6 Puget Sound region, Washington. This one was a foreshock.

Onalaska forecastMore in Washington

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
2.5 (md), micro
Local time
UTC
1977-03-06 11:01:35 UTC
Depth
28.0 km (17.4 mi), shallow
Epicenter
46.564° N, 122.779° W
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 1.4 km horizontally, 3.0 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
191°, 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: 17 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.6Puget Sound region, Washington · 18096 days ago · 21 km deep · 83 km away
  2. 1.71 km SSW of Federal Way, Washington · 18089 days ago · 20 km deep · 90 km away
  3. 2.1Puget Sound region, Washington · 18087 days ago · 64 km deep · 98 km away
  4. 2.316 km SE of Carbonado, Washington · 18084 days ago · 16 km deep · 81 km away
  5. 2.12 km SSE of Dash Point, Washington · 18081 days ago · 14 km deep · 87 km away
  6. 2.312 km SW of Mossyrock, Washington · 18078 days ago · -1 km deep · 17 km away
  7. 2.33 km NNE of Bonney Lake, Washington · 18076 days ago · 8 km deep · 85 km away
  8. 2.82 km N of Bonney Lake, Washington · 18076 days ago · 13 km deep · 84 km away
  9. 2.02 km SSW of Bonney Lake, Washington · 18076 days ago · 25 km deep · 79 km away
  10. 2.24 km ENE of Bonney Lake, WA · 18069 days ago · 24 km deep · 86 km away
  11. 2.42 km NNE of Bonney Lake, Washington · 18067 days ago · 18 km deep · 85 km away
  12. 1.94 km NE of Bonney Lake, Washington · 18061 days ago · 24 km deep · 86 km away
  13. 2.12 km E of Dash Point, Washington · 18053 days ago · 12 km deep · 89 km away
  14. 1.92 km ESE of Dash Point, Washington · 18052 days ago · 12 km deep · 88 km away
  15. 1.87 km SE of Enumclaw, Washington · 18044 days ago · 19 km deep · 93 km away
  16. 2.00 km NW of North Puyallup, Washington · 18040 days ago · 15 km deep · 81 km away
  17. 3.229 km S of Morton, Washington · 18037 days ago · 6 km deep · 52 km away

Before

  1. 2.315 km WSW of Greenwater, Washington · 18097 days ago · 8 km deep · 93 km away
  2. 2.94 km SW of Morton, Washington · 18105 days ago · 22 km deep · 35 km away
  3. 2.96 km SW of Morton, Washington · 18105 days ago · 20 km deep · 35 km away
  4. 2.412 km N of Ashford, Washington · 18112 days ago · 1 km deep · 68 km away
  5. 2.411 km SSW of Alder, Washington · 18116 days ago · 15 km deep · 37 km away
  6. 2.110 km ENE of Kalama, Washington · 18119 days ago · 0 km deep · 57 km away
  7. 2.510 km E of Kalama, Washington · 18119 days ago · 16 km deep · 60 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10843263. Read Mon, Sep 21, 2026, 9:46 PM UTC.