Washington earthquakes

M1.9 earthquake 13 km WNW of Mattawa, Washington

A magnitude 1.9 earthquake struck 13 km WNW of Mattawa, Washington on Tue, Sep 24, 1985, 4:56 PM PDT (23:56 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.0 1 km SW of Quincy, 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
1.9 (md), micro
Local time
UTC
1985-09-24 23:56:09 UTC
Depth
3.3 km (2.0 mi), shallow
Epicenter
46.805° N, 120.058° 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 2.4 km horizontally, 2.8 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
77°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 1.712 km WNW of Mattawa, Washington · 14972 days ago · 0 km deep · 1 km away
  2. 2.01 km SW of Quincy, Washington · 14970 days ago · 0 km deep · 49 km away
  3. 3.012 km WNW of Mattawa, Washington · 14966 days ago · 1 km deep · 1 km away
  4. 3.012 km WNW of Mattawa, Washington · 14966 days ago · 1 km deep · 2 km away
  5. 2.512 km WNW of Mattawa, Washington · 14966 days ago · 1 km deep · 1 km away
  6. 1.68 km NNE of Selah, Washington · 14959 days ago · 19 km deep · 35 km away
  7. 1.622 km NNE of Terrace Heights, Washington · 14952 days ago · 0 km deep · 18 km away
  8. 2.123 km NNE of Terrace Heights, Washington · 14952 days ago · 2 km deep · 18 km away
  9. 1.711 km S of Toppenish, Washington · 14952 days ago · -1 km deep · 63 km away
  10. 1.822 km NNE of Terrace Heights, Washington · 14946 days ago · 2 km deep · 19 km away
  11. 1.914 km SSW of Vantage, Washington · 14945 days ago · 0 km deep · 2 km away
  12. 1.912 km NW of Mattawa, Washington · 14945 days ago · 4 km deep · 2 km away
  13. 1.723 km NE of Terrace Heights, Washington · 14940 days ago · 3 km deep · 16 km away
  14. 2.515 km NNE of Richland, Washington · 14940 days ago · 1 km deep · 80 km away
  15. 2.814 km NNE of Richland, Washington · 14940 days ago · 2 km deep · 80 km away
  16. 3.28 km NNW of Moses Lake North, Washington · 14914 days ago · 20 km deep · 74 km away

Before

  1. 2.10 km E of Entiat, Washington · 14977 days ago · 0 km deep · 97 km away
  2. 2.213 km WNW of Mattawa, Washington · 14992 days ago · 0 km deep · 1 km away
  3. 2.1Washington · 15000 days ago · 2 km deep · 97 km away
  4. 2.112 km SSW of Toppenish, Washington · 15000 days ago · -1 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10195798. Read Tue, Sep 22, 2026, 10:29 AM UTC.