Washington earthquakes

M1.8 earthquake 12 km SE of Mossyrock, Washington

A magnitude 1.8 earthquake struck 12 km SE of Mossyrock, Washington on Thu, Feb 21, 1985, 8:22 PM PST (04:22 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M2.8 10 km SSE of Mineral, 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
1.8 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1985-02-22 04:22:55 UTC
Depth
14.3 km (8.9 mi), shallow
Epicenter
46.444° N, 122.376° 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 0.4 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
101°
Stations used
16

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.538 km NNE of Amboy, Washington · 15195 days ago · -1 km deep · 30 km away
  2. 1.56 km SSW of Morton, Washington · 15190 days ago · 20 km deep · 8 km away
  3. 1.622 km S of Morton, Washington · 15186 days ago · 15 km deep · 12 km away
  4. 1.538 km NNE of Amboy, Washington · 15185 days ago · -1 km deep · 30 km away
  5. 1.819 km SSE of Mossyrock, Washington · 15184 days ago · 20 km deep · 9 km away
  6. 1.59 km E of Ashford, Washington · 15183 days ago · 5 km deep · 50 km away
  7. 2.53 km SSW of Greenwater, Washington · 15173 days ago · 16 km deep · 93 km away
  8. 1.84 km E of Winlock, Washington · 15170 days ago · -1 km deep · 38 km away
  9. 2.58 km SE of Mineral, Washington · 15164 days ago · 18 km deep · 31 km away
  10. 1.54 km SSW of Orting, Washington · 15163 days ago · 0 km deep · 70 km away
  11. 1.710 km SSE of Mineral, Washington · 15161 days ago · 16 km deep · 27 km away
  12. 1.810 km SSE of Mineral, Washington · 15160 days ago · 16 km deep · 27 km away
  13. 2.810 km SSE of Mineral, Washington · 15160 days ago · 15 km deep · 27 km away
  14. 1.510 km SSE of Mineral, Washington · 15160 days ago · 16 km deep · 27 km away
  15. 2.610 km SSE of Mineral, Washington · 15160 days ago · 16 km deep · 27 km away
  16. 2.417 km SSE of Carbonado, Washington · 15154 days ago · 13 km deep · 63 km away
  17. 2.18 km S of Morton, Washington · 15151 days ago · 3 km deep · 8 km away
  18. 1.81 km SE of Deer Island, Oregon · 15146 days ago · 24 km deep · 68 km away
  19. 2.124 km S of Morton, Washington · 15146 days ago · 7 km deep · 15 km away
  20. 1.638 km NNE of Amboy, Washington · 15143 days ago · -1 km deep · 30 km away

Before

  1. 1.91 km E of Meadow Glade, Washington · 15201 days ago · 10 km deep · 77 km away
  2. 1.538 km NNE of Amboy, Washington · 15201 days ago · -1 km deep · 30 km away
  3. 1.52 km ENE of Brush Prairie, Washington · 15212 days ago · 9 km deep · 79 km away
  4. 1.815 km NNE of Ashford, Washington · 15213 days ago · 10 km deep · 59 km away
  5. 2.138 km NNE of Amboy, Washington · 15213 days ago · -1 km deep · 30 km away
  6. 1.63 km WSW of Felida, Washington · 15216 days ago · 11 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10187418. Read Thu, Oct 1, 2026, 1:15 PM UTC.