Washington earthquakes

M2.2 earthquake 9 km NW of Mattawa, Washington

A magnitude 2.2 earthquake struck 9 km NW of Mattawa, Washington on Thu, Dec 20, 1990, 8:05 PM PST (04:05 UTC), 2 km (2 mi) below the surface.

A larger quake followed: M3.4 9 km NW of Mattawa, Washington. This one was a foreshock.

Mattawa 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
2.2 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1990-12-21 04:05:31 UTC
Depth
2.4 km (1.5 mi), shallow
Epicenter
46.795° N, 119.989° 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 0.5 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
43°
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 1.59 km NW of Mattawa, Washington · 13069 days ago · 2 km deep · 1 km away
  2. 3.49 km NW of Mattawa, Washington · 13068 days ago · 3 km deep · 0 km away
  3. 2.44 km W of Entiat, Washington · 13048 days ago · 3 km deep · 100 km away
  4. 1.97 km NNE of Bickleton, Washington · 13047 days ago · 11 km deep · 85 km away
  5. 1.916 km NE of Naches, Washington · 13026 days ago · 6 km deep · 42 km away
  6. 3.414 km NE of Naches, Washington · 13026 days ago · 6 km deep · 43 km away
  7. 2.71 km SSW of Warden, Washington · 13025 days ago · 2 km deep · 74 km away

Before

  1. 2.54 km NW of Bickleton, Washington · 13073 days ago · -1 km deep · 89 km away
  2. 1.99 km NW of Mattawa, Washington · 13074 days ago · 3 km deep · 1 km away
  3. 2.29 km NW of Mattawa, Washington · 13074 days ago · 3 km deep · 1 km away
  4. 1.97 km WSW of George, Washington · 13074 days ago · 0 km deep · 29 km away
  5. 3.19 km NW of Mattawa, Washington · 13075 days ago · 3 km deep · 1 km away
  6. 1.611 km NE of Nile, Washington · 13079 days ago · 13 km deep · 64 km away
  7. 2.110 km NE of Nile, Washington · 13079 days ago · 1 km deep · 65 km away
  8. 2.01 km SE of Cowiche, Washington · 13080 days ago · 15 km deep · 56 km away
  9. 1.515 km SSW of Cascade Valley, Washington · 13086 days ago · 0 km deep · 50 km away
  10. 1.814 km SW of Ellensburg, Washington · 13096 days ago · 6 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10270963. Read Fri, Oct 2, 2026, 6:47 AM UTC.