Washington earthquakes

M1.7 earthquake 16 km NNE of Mossyrock, Washington

A magnitude 1.7 earthquake struck 16 km NNE of Mossyrock, Washington on Wed, Sep 15, 1976, 1:38 PM PDT (20:38 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M2.2 12 km N of Ashford, 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
1.7 (md), micro
Local time
UTC
1976-09-15 20:38:44 UTC
Depth
12.3 km (7.6 mi), shallow
Epicenter
46.678° N, 122.437° 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, 2.9 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
137°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 1.7Puget Sound region, Washington · 18268 days ago · 18 km deep · 92 km away
  2. 2.212 km N of Ashford, Washington · 18259 days ago · 3 km deep · 38 km away
  3. 1.6Washington · 18251 days ago · 13 km deep · 96 km away
  4. 2.417 km NE of Ashford, Washington · 18250 days ago · 14 km deep · 48 km away
  5. 1.75 km ENE of Belfair, Washington · 18245 days ago · 19 km deep · 91 km away
  6. 2.014 km NNW of Morton, Washington · 18244 days ago · 11 km deep · 6 km away
  7. 2.05 km NNW of Onalaska, Washington · 18242 days ago · 42 km deep · 25 km away
  8. 4.014 km NNW of Morton, Washington · 18240 days ago · 16 km deep · 5 km away
  9. 2.113 km WSW of Mineral, Washington · 18239 days ago · 16 km deep · 6 km away
  10. 2.42 km NE of Maple Valley, Washington · 18236 days ago · 13 km deep · 87 km away
  11. 1.97 km ENE of Hobart, Washington · 18234 days ago · 22 km deep · 96 km away
  12. 1.91 km W of Hobart, Washington · 18234 days ago · 18 km deep · 89 km away
  13. 1.84 km S of Orting, Washington · 18234 days ago · -1 km deep · 45 km away
  14. 1.96 km N of Packwood, Washington · 18230 days ago · 1 km deep · 58 km away
  15. 2.211 km S of Greenwater, Washington · 18228 days ago · 4 km deep · 72 km away
  16. 1.86 km SSW of Southworth, Washington · 18218 days ago · 23 km deep · 88 km away
  17. 3.122 km ENE of Ashford, Washington · 18212 days ago · -1 km deep · 55 km away
  18. 2.924 km ENE of Ashford, Washington · 18212 days ago · 4 km deep · 56 km away

Before

  1. 1.63 km NNW of White Center, Washington · 18272 days ago · 12 km deep · 97 km away
  2. 1.611 km S of Ashford, WA · 18275 days ago · 38 km deep · 29 km away
  3. 1.730 km N of Amboy, Washington · 18275 days ago · 1 km deep · 55 km away
  4. 4.52 km NNE of Union, Washington · 18276 days ago · 45 km deep · 92 km away
  5. 1.94 km W of Packwood, Washington · 18278 days ago · 5 km deep · 55 km away
  6. 1.515 km SW of Alder, Washington · 18280 days ago · 9 km deep · 2 km away
  7. 1.628 km NW of Trout Lake, Washington · 18282 days ago · 9 km deep · 75 km away
  8. 1.710 km W of Skokomish, Washington · 18288 days ago · 8 km deep · 97 km away
  9. 1.53 km WSW of Issaquah, Washington · 18290 days ago · 11 km deep · 97 km away
  10. 1.61 km ENE of Riverton, Washington · 18294 days ago · 24 km deep · 91 km away
  11. 1.60 km ESE of Boulevard Park, Washington · 18295 days ago · 32 km deep · 90 km away
  12. 2.221 km SSE of Mossyrock, Washington · 18296 days ago · 3 km deep · 36 km away
  13. 1.510 km WNW of Packwood, Washington · 18296 days ago · -1 km deep · 49 km away
  14. 2.031 km S of Morton, Washington · 18297 days ago · 18 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10842213. Read Tue, Sep 22, 2026, 10:00 AM UTC.