Washington earthquakes

M2.5 earthquake 31 km S of Mossyrock, Washington

A magnitude 2.5 earthquake struck 31 km S of Mossyrock, Washington on Tue, Feb 27, 1973, 6:05 AM PST (14:05 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.7 7 km SE of Mineral, 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
2.5 (md), micro
Local time
UTC
1973-02-27 14:05:02 UTC
Depth
9.5 km (5.9 mi), shallow
Epicenter
46.250° N, 122.429° 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 1.5 km horizontally, 3.0 km in depth
Magnitude uncertainty
±0.23
Depth from
Operator assigned
Station coverage gap
212°, poorly surrounded by stations
Stations used
7

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 3 in the 30 days before it.

After

  1. 2.77 km SE of Mineral, Washington · 19559 days ago · 19 km deep · 53 km away
  2. 1.76 km SE of Mineral, Washington · 19555 days ago · 16 km deep · 52 km away
  3. 2.212 km NE of Ashford, Washington · 19550 days ago · 6 km deep · 77 km away
  4. 2.142 km NE of Amboy, Washington · 19549 days ago · 2 km deep · 30 km away
  5. 1.93 km ENE of McKenna, Washington · 19538 days ago · 31 km deep · 77 km away
  6. 1.722 km ENE of Kalama, Washington · 19527 days ago · 32 km deep · 20 km away
  7. 3.029 km S of Morton, Washington · 19526 days ago · 16 km deep · 18 km away
  8. 2.110 km SE of Mineral, Washington · 19525 days ago · 26 km deep · 50 km away
  9. 2.414 km NNE of Ashford, Washington · 19518 days ago · 1 km deep · 79 km away
  10. 3.429 km S of Morton, Washington · 19514 days ago · 13 km deep · 17 km away
  11. 2.62 km SSE of DuPont, Washington · 19509 days ago · 26 km deep · 93 km away

Before

  1. 2.77 km SW of Morton, Washington · 19565 days ago · 15 km deep · 30 km away
  2. 1.62 km NNW of Kapowsin, Washington · 19568 days ago · 67 km deep · 85 km away
  3. 2.815 km SE of Ashford, Washington · 19583 days ago · 7 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10855903. Read Tue, Sep 22, 2026, 10:17 AM UTC.