Washington earthquakes

M2.3 earthquake 12 km SW of Mossyrock, Washington

A magnitude 2.3 earthquake struck 12 km SW of Mossyrock, Washington on Thu, Mar 24, 1977, 6:08 PM PST (02:08 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M2.8 2 km N of Bonney Lake, Washington. This one was a foreshock.

Mossyrock forecastMore in Washington

Map

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

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The earthquake

Magnitude
2.3 (md), micro
Local time
UTC
1977-03-25 02:08:55 UTC
Depth
-1.0 km (-0.6 mi), shallow
Epicenter
46.463° N, 122.614° 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 0.1 km horizontally, 0.1 km in depth
Magnitude uncertainty
±0.08
Depth from
Operator assigned
Station coverage gap
275°, poorly surrounded by stations
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: 15 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 2.33 km NNE of Bonney Lake, Washington · 18077 days ago · 8 km deep · 89 km away
  2. 2.82 km N of Bonney Lake, Washington · 18077 days ago · 13 km deep · 89 km away
  3. 2.02 km SSW of Bonney Lake, Washington · 18077 days ago · 25 km deep · 83 km away
  4. 2.24 km ENE of Bonney Lake, WA · 18070 days ago · 24 km deep · 89 km away
  5. 2.42 km NNE of Bonney Lake, Washington · 18068 days ago · 18 km deep · 89 km away
  6. 1.94 km NE of Bonney Lake, Washington · 18061 days ago · 24 km deep · 89 km away
  7. 2.12 km E of Dash Point, Washington · 18054 days ago · 12 km deep · 97 km away
  8. 1.92 km ESE of Dash Point, Washington · 18053 days ago · 12 km deep · 96 km away
  9. 1.87 km SE of Enumclaw, Washington · 18044 days ago · 19 km deep · 93 km away
  10. 2.00 km NW of North Puyallup, Washington · 18040 days ago · 15 km deep · 87 km away
  11. 3.229 km S of Morton, Washington · 18038 days ago · 6 km deep · 36 km away
  12. 2.218 km NNE of Ashford, Washington · 18025 days ago · 8 km deep · 71 km away
  13. 2.52 km SW of Brady, Washington · 18024 days ago · 39 km deep · 91 km away
  14. 2.66 km SSW of Morton, Washington · 18021 days ago · 19 km deep · 24 km away
  15. 2.931 km NE of Amboy, Washington · 18020 days ago · 13 km deep · 57 km away

Before

  1. 2.12 km SSE of Dash Point, Washington · 18082 days ago · 14 km deep · 95 km away
  2. 2.316 km SE of Carbonado, Washington · 18085 days ago · 16 km deep · 79 km away
  3. 1.71 km SSW of Federal Way, Washington · 18090 days ago · 20 km deep · 96 km away
  4. 2.6Puget Sound region, Washington · 18096 days ago · 21 km deep · 93 km away
  5. 2.54 km WSW of Onalaska, Washington · 18097 days ago · 28 km deep · 17 km away
  6. 2.315 km WSW of Greenwater, Washington · 18098 days ago · 8 km deep · 92 km away
  7. 2.94 km SW of Morton, Washington · 18106 days ago · 22 km deep · 24 km away
  8. 2.96 km SW of Morton, Washington · 18106 days ago · 20 km deep · 22 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10843403. Read Tue, Sep 22, 2026, 5:15 PM UTC.