Washington earthquakes

M1.5 earthquake 9 km NW of Mattawa, Washington

A magnitude 1.5 earthquake struck 9 km NW of Mattawa, Washington on Thu, Dec 20, 1990, 11:24 PM PST (07:24 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1990-12-21 07:24:04 UTC
Depth
2.4 km (1.5 mi), shallow
Epicenter
46.807° N, 119.981° 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 0.6 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
41°
Stations used
24

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 11 in the 30 days before it.

After

  1. 3.49 km NW of Mattawa, Washington · 13068 days ago · 3 km deep · 1 km away
  2. 2.44 km W of Entiat, Washington · 13048 days ago · 3 km deep · 98 km away
  3. 1.97 km NNE of Bickleton, Washington · 13047 days ago · 11 km deep · 86 km away
  4. 2.413 km W of Entiat, Washington · 13042 days ago · -1 km deep · 100 km away
  5. 1.916 km NE of Naches, Washington · 13026 days ago · 6 km deep · 43 km away
  6. 3.414 km NE of Naches, Washington · 13026 days ago · 6 km deep · 44 km away
  7. 2.71 km SSW of Warden, Washington · 13025 days ago · 2 km deep · 73 km away

Before

  1. 2.29 km NW of Mattawa, Washington · 13069 days ago · 2 km deep · 1 km away
  2. 2.54 km NW of Bickleton, Washington · 13073 days ago · -1 km deep · 90 km away
  3. 1.99 km NW of Mattawa, Washington · 13074 days ago · 3 km deep · 1 km away
  4. 2.29 km NW of Mattawa, Washington · 13074 days ago · 3 km deep · 1 km away
  5. 1.97 km WSW of George, Washington · 13074 days ago · 0 km deep · 27 km away
  6. 3.19 km NW of Mattawa, Washington · 13075 days ago · 3 km deep · 1 km away
  7. 1.611 km NE of Nile, Washington · 13079 days ago · 13 km deep · 65 km away
  8. 2.110 km NE of Nile, Washington · 13079 days ago · 1 km deep · 66 km away
  9. 2.01 km SE of Cowiche, Washington · 13080 days ago · 15 km deep · 57 km away
  10. 1.515 km SSW of Cascade Valley, Washington · 13086 days ago · 0 km deep · 49 km away
  11. 1.814 km SW of Ellensburg, Washington · 13096 days ago · 6 km deep · 53 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10271248. Read Fri, Oct 2, 2026, 7:29 AM UTC.