Washington earthquakes

M1.9 earthquake 13 km SE of Mossyrock, Washington

A magnitude 1.9 earthquake struck 13 km SE of Mossyrock, Washington on Wed, Aug 18, 1982, 2:55 AM PDT (09:55 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.4 23 km ESE of Packwood, 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
1.9 (md), micro
Local time
UTC
1982-08-18 09:55:10 UTC
Depth
10.4 km (6.5 mi), shallow
Epicenter
46.433° N, 122.390° 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, 0.7 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
59°
Stations used
18

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 19 in the 30 days before it.

After

  1. 2.137 km NNE of Amboy, Washington · 16111 days ago · 1 km deep · 30 km away
  2. 1.737 km NNE of Amboy, Washington · 16111 days ago · 0 km deep · 31 km away
  3. 2.322 km S of Morton, Washington · 16110 days ago · 8 km deep · 14 km away
  4. 1.525 km S of Morton, Washington · 16105 days ago · 8 km deep · 16 km away
  5. 2.423 km ESE of Packwood, Washington · 16101 days ago · 0 km deep · 78 km away
  6. 1.916 km NNE of Ashford, Washington · 16101 days ago · 8 km deep · 62 km away
  7. 1.723 km ESE of Packwood, Washington · 16100 days ago · 2 km deep · 78 km away
  8. 1.86 km S of Greenwater, Washington · 16096 days ago · 2 km deep · 93 km away
  9. 1.837 km SSE of Morton, Washington · 16096 days ago · 9 km deep · 30 km away
  10. 1.613 km NE of Ashford, Washington · 16095 days ago · 9 km deep · 59 km away
  11. 1.622 km S of Morton, Washington · 16094 days ago · 4 km deep · 14 km away
  12. 2.222 km ESE of Packwood, Washington · 16093 days ago · 0 km deep · 78 km away
  13. 1.612 km NE of Ashford, Washington · 16085 days ago · 9 km deep · 58 km away
  14. 1.83 km NNE of Packwood, Washington · 16082 days ago · 4 km deep · 61 km away
  15. 1.936 km NNE of Amboy, Washington · 16081 days ago · -1 km deep · 30 km away
  16. 1.823 km S of Morton, Washington · 16078 days ago · 9 km deep · 15 km away
  17. 1.90 km N of Lakeland South, Washington · 16078 days ago · 7 km deep · 95 km away
  18. 1.517 km NW of Packwood, Washington · 16075 days ago · -1 km deep · 55 km away
  19. 1.725 km S of Morton, Washington · 16060 days ago · 8 km deep · 17 km away
  20. 2.021 km S of Morton, Washington · 16057 days ago · 10 km deep · 13 km away

Before

  1. 2.837 km NNE of Amboy, Washington · 16112 days ago · 0 km deep · 30 km away
  2. 2.537 km NNE of Amboy, Washington · 16112 days ago · 0 km deep · 30 km away
  3. 1.638 km NNE of Amboy, Washington · 16112 days ago · -1 km deep · 30 km away
  4. 2.037 km NNE of Amboy, Washington · 16112 days ago · -1 km deep · 30 km away
  5. 1.538 km NNE of Amboy, Washington · 16112 days ago · 0 km deep · 30 km away
  6. 2.538 km NNE of Amboy, Washington · 16113 days ago · 0 km deep · 30 km away
  7. 1.942 km WNW of Trout Lake, Washington · 16113 days ago · 0 km deep · 40 km away
  8. 1.94 km SSW of Orting, Washington · 16113 days ago · -1 km deep · 71 km away
  9. 1.838 km NNE of Amboy, Washington · 16114 days ago · 0 km deep · 30 km away
  10. 1.638 km NNE of Amboy, Washington · 16114 days ago · 0 km deep · 30 km away
  11. 1.92 km WNW of Artondale, Washington · 16121 days ago · 24 km deep · 99 km away
  12. 1.838 km NNE of Amboy, Washington · 16122 days ago · 0 km deep · 29 km away
  13. 1.94 km WSW of Packwood, Washington · 16126 days ago · 12 km deep · 54 km away
  14. 1.88 km E of Ashford, Washington · 16128 days ago · -1 km deep · 50 km away
  15. 2.31 km SSE of Ashford, Washington · 16130 days ago · 7 km deep · 45 km away
  16. 1.625 km S of Morton, Washington · 16132 days ago · 8 km deep · 17 km away
  17. 2.111 km S of Greenwater, Washington · 16133 days ago · 0 km deep · 90 km away
  18. 1.633 km NE of Amboy, Washington · 16134 days ago · 1 km deep · 36 km away
  19. 1.624 km S of Morton, Washington · 16137 days ago · 5 km deep · 16 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10143458. Read Sun, Sep 27, 2026, 10:04 PM UTC.