Washington earthquakes

M1.6 earthquake 18 km SSE of Packwood, Washington

A magnitude 1.6 earthquake struck 18 km SSE of Packwood, Washington on Fri, Feb 20, 1976, 5:11 AM PST (13:11 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M2.0 6 km W of Easton, Washington. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.6 (md), micro
Local time
UTC
1976-02-20 13:11:20 UTC
Depth
11.5 km (7.2 mi), shallow
Epicenter
46.454° N, 121.563° 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 1.7 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.18
Depth from
Operator assigned
Station coverage gap
249°, 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: 5 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.06 km W of Easton, Washington · 18459 days ago · 14 km deep · 91 km away
  2. 1.89 km NE of Ashford, Washington · 18447 days ago · 6 km deep · 50 km away
  3. 1.622 km NE of Ashford, Washington · 18446 days ago · 20 km deep · 54 km away
  4. 2.24 km NNE of Mossyrock, Washington · 18434 days ago · 16 km deep · 69 km away
  5. 1.821 km NE of Packwood, Washington · 18418 days ago · 5 km deep · 33 km away

Before

  1. 1.814 km SE of Mossyrock, Washington · 18477 days ago · 9 km deep · 61 km away
  2. 1.612 km SSW of Morton, Washington · 18479 days ago · 15 km deep · 60 km away
  3. 1.612 km SE of Mossyrock, Washington · 18484 days ago · 14 km deep · 62 km away
  4. 1.811 km NE of Ashford, Washington · 18506 days ago · 8 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10840738. Read Tue, Sep 22, 2026, 8:45 PM UTC.