Washington earthquakes

M1.5 earthquake 7 km SE of Kittitas, Washington

A magnitude 1.5 earthquake struck 7 km SE of Kittitas, Washington on Mon, Aug 12, 1991, 11:20 AM PDT (18:20 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.7 8 km SE of Kittitas, Washington. This one was a foreshock.

Kittitas 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
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-08-12 18:20:15 UTC
Depth
3.1 km (1.9 mi), shallow
Epicenter
46.940° N, 120.337° 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 0.8 km horizontally, 1.2 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
65°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 21 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 1.55 km S of Royal City, Washington · 12836 days ago · 12 km deep · 54 km away
  2. 1.516 km E of Mattawa, Washington · 12831 days ago · 0 km deep · 54 km away
  3. 1.515 km E of Mattawa, Washington · 12831 days ago · 0 km deep · 53 km away
  4. 2.47 km SE of Kittitas, Washington · 12831 days ago · 3 km deep · 2 km away
  5. 1.57 km SSE of Kittitas, Washington · 12830 days ago · 4 km deep · 3 km away
  6. 2.010 km S of White Swan, Washington · 12829 days ago · -1 km deep · 79 km away
  7. 2.35 km NNE of Waterville, Washington · 12828 days ago · 5 km deep · 87 km away
  8. 1.56 km SE of Kittitas, Washington · 12828 days ago · 3 km deep · 2 km away
  9. 2.56 km SE of Kittitas, Washington · 12824 days ago · 3 km deep · 1 km away
  10. 1.96 km SE of Kittitas, Washington · 12823 days ago · 0 km deep · 1 km away
  11. 2.78 km SE of Kittitas, Washington · 12808 days ago · 4 km deep · 1 km away
  12. 2.67 km SE of Kittitas, Washington · 12807 days ago · 3 km deep · 1 km away
  13. 2.312 km ENE of Naches, Washington · 12803 days ago · 10 km deep · 24 km away
  14. 1.816 km E of Mattawa, Washington · 12803 days ago · 0 km deep · 54 km away
  15. 1.517 km E of Mattawa, Washington · 12802 days ago · 0 km deep · 55 km away
  16. 1.917 km S of Ellensburg, Washington · 12799 days ago · 5 km deep · 19 km away
  17. 1.57 km SSE of Kittitas, Washington · 12796 days ago · 5 km deep · 2 km away
  18. 2.17 km SE of Kittitas, Washington · 12796 days ago · 3 km deep · 2 km away
  19. 1.96 km SE of Kittitas, Washington · 12795 days ago · 3 km deep · 2 km away
  20. 1.78 km S of Leavenworth, Washington · 12789 days ago · 0 km deep · 69 km away
  21. 1.716 km E of Mattawa, Washington · 12779 days ago · 0 km deep · 54 km away

Before

  1. 2.86 km SE of Kittitas, Washington · 12844 days ago · 4 km deep · 1 km away
  2. 1.67 km SE of Kittitas, Washington · 12844 days ago · 2 km deep · 2 km away
  3. 1.621 km SW of South Wenatchee, Washington · 12846 days ago · 8 km deep · 35 km away
  4. 1.716 km E of Mattawa, Washington · 12846 days ago · 0 km deep · 54 km away
  5. 1.82 km SE of Entiat, Washington · 12849 days ago · 4 km deep · 81 km away
  6. 2.09 km NNE of Waterville, Washington · 12851 days ago · 4 km deep · 90 km away
  7. 1.78 km N of Waterville, Washington · 12853 days ago · 2 km deep · 90 km away
  8. 1.716 km E of Mattawa, Washington · 12858 days ago · 0 km deep · 55 km away
  9. 1.67 km SE of Kittitas, Washington · 12862 days ago · 2 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10276598. Read Sun, Oct 4, 2026, 6:23 AM UTC.