Washington earthquakes

M1.7 earthquake 30 km N of Amboy, Washington

A magnitude 1.7 earthquake struck 30 km N of Amboy, Washington on Thu, Sep 9, 1976, 1:46 AM PDT (08:46 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M2.2 12 km N of Ashford, Washington. This one was a foreshock.

Amboy 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
1976-09-09 08:46:20 UTC
Depth
1.5 km (0.9 mi), shallow
Epicenter
46.183° N, 122.468° 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.

Magnitude uncertainty
±0.07
Depth from
Operator assigned
Station coverage gap
282°, 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: 11 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.611 km S of Ashford, WA · 18275 days ago · 38 km deep · 62 km away
  2. 1.716 km NNE of Mossyrock, Washington · 18269 days ago · 12 km deep · 55 km away
  3. 2.212 km N of Ashford, Washington · 18259 days ago · 3 km deep · 84 km away
  4. 2.417 km NE of Ashford, Washington · 18250 days ago · 14 km deep · 89 km away
  5. 2.014 km NNW of Morton, Washington · 18244 days ago · 11 km deep · 55 km away
  6. 2.05 km NNW of Onalaska, Washington · 18242 days ago · 42 km deep · 53 km away
  7. 4.014 km NNW of Morton, Washington · 18240 days ago · 16 km deep · 55 km away
  8. 2.113 km WSW of Mineral, Washington · 18240 days ago · 16 km deep · 56 km away
  9. 1.84 km S of Orting, Washington · 18234 days ago · -1 km deep · 99 km away
  10. 1.96 km N of Packwood, Washington · 18230 days ago · 1 km deep · 80 km away
  11. 1.517 km SW of Westport, Oregon · 18227 days ago · 10 km deep · 83 km away

Before

  1. 1.94 km W of Packwood, Washington · 18278 days ago · 5 km deep · 74 km away
  2. 1.515 km SW of Alder, Washington · 18281 days ago · 9 km deep · 57 km away
  3. 1.62 km ENE of Brush Prairie, Washington · 18282 days ago · 10 km deep · 49 km away
  4. 1.628 km NW of Trout Lake, Washington · 18282 days ago · 9 km deep · 54 km away
  5. 2.221 km SSE of Mossyrock, Washington · 18296 days ago · 3 km deep · 20 km away
  6. 1.510 km WNW of Packwood, Washington · 18297 days ago · -1 km deep · 71 km away
  7. 2.031 km S of Morton, Washington · 18297 days ago · 18 km deep · 19 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10842193. Read Tue, Sep 22, 2026, 12:18 PM UTC.