Washington earthquakes

M1.6 earthquake 7 km SE of Kittitas, Washington

A magnitude 1.6 earthquake struck 7 km SE of Kittitas, Washington on Thu, Jul 18, 1991, 5:47 AM PDT (12:47 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M2.8 6 km SE of Kittitas, 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
1.6 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-07-18 12:47:27 UTC
Depth
2.4 km (1.5 mi), shallow
Epicenter
46.933° N, 120.362° 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
55°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 1.716 km E of Mattawa, Washington · 12859 days ago · 0 km deep · 56 km away
  2. 1.78 km N of Waterville, Washington · 12853 days ago · 2 km deep · 91 km away
  3. 2.09 km NNE of Waterville, Washington · 12851 days ago · 4 km deep · 91 km away
  4. 1.82 km SE of Entiat, Washington · 12849 days ago · 4 km deep · 82 km away
  5. 1.716 km E of Mattawa, Washington · 12847 days ago · 0 km deep · 55 km away
  6. 1.621 km SW of South Wenatchee, Washington · 12847 days ago · 8 km deep · 36 km away
  7. 1.67 km SE of Kittitas, Washington · 12844 days ago · 2 km deep · 0 km away
  8. 2.86 km SE of Kittitas, Washington · 12844 days ago · 4 km deep · 1 km away
  9. 1.57 km SE of Kittitas, Washington · 12837 days ago · 3 km deep · 2 km away
  10. 1.55 km S of Royal City, Washington · 12836 days ago · 12 km deep · 56 km away
  11. 1.516 km E of Mattawa, Washington · 12832 days ago · 0 km deep · 55 km away
  12. 1.515 km E of Mattawa, Washington · 12831 days ago · 0 km deep · 55 km away
  13. 2.47 km SE of Kittitas, Washington · 12831 days ago · 3 km deep · 0 km away
  14. 1.57 km SSE of Kittitas, Washington · 12830 days ago · 4 km deep · 1 km away
  15. 2.010 km S of White Swan, Washington · 12829 days ago · -1 km deep · 77 km away
  16. 2.35 km NNE of Waterville, Washington · 12829 days ago · 5 km deep · 88 km away
  17. 1.56 km SE of Kittitas, Washington · 12828 days ago · 3 km deep · 0 km away
  18. 2.56 km SE of Kittitas, Washington · 12825 days ago · 3 km deep · 1 km away
  19. 1.96 km SE of Kittitas, Washington · 12824 days ago · 0 km deep · 1 km away
  20. 2.78 km SE of Kittitas, Washington · 12808 days ago · 4 km deep · 3 km away
  21. 2.67 km SE of Kittitas, Washington · 12807 days ago · 3 km deep · 1 km away
  22. 2.312 km ENE of Naches, Washington · 12804 days ago · 10 km deep · 22 km away
  23. 1.816 km E of Mattawa, Washington · 12803 days ago · 0 km deep · 56 km away
  24. 1.517 km E of Mattawa, Washington · 12803 days ago · 0 km deep · 56 km away

Before

  1. 2.68 km SE of Kittitas, Washington · 12872 days ago · 4 km deep · 2 km away
  2. 2.6Washington · 12873 days ago · 4 km deep · 3 km away
  3. 2.07 km SE of Kittitas, Washington · 12873 days ago · 3 km deep · 2 km away
  4. 3.38 km SE of Kittitas, Washington · 12874 days ago · 3 km deep · 2 km away
  5. 2.17 km SE of Kittitas, Washington · 12874 days ago · 4 km deep · 2 km away
  6. 1.75 km SSE of Kittitas, Washington · 12874 days ago · 1 km deep · 1 km away
  7. 2.37 km SE of Kittitas, Washington · 12874 days ago · 3 km deep · 1 km away
  8. 3.47 km SE of Kittitas, Washington · 12874 days ago · 3 km deep · 2 km away
  9. 1.76 km SE of Kittitas, Washington · 12875 days ago · 3 km deep · 1 km away
  10. 1.58 km SE of Kittitas, Washington · 12884 days ago · 4 km deep · 2 km away
  11. 1.63 km S of Entiat, Washington · 12886 days ago · -1 km deep · 80 km away
  12. 1.79 km SSW of Prosser, Washington · 12887 days ago · 23 km deep · 100 km away
  13. 2.68 km SE of Kittitas, Washington · 12888 days ago · 4 km deep · 2 km away
  14. 2.97 km SE of Kittitas, Washington · 12888 days ago · 4 km deep · 2 km away
  15. 2.122 km SSE of Greenwater, Washington · 12889 days ago · 10 km deep · 91 km away
  16. 1.57 km SE of Kittitas, Washington · 12890 days ago · 4 km deep · 1 km away
  17. 2.57 km SE of Kittitas, Washington · 12890 days ago · 3 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10280278. Read Sun, Oct 4, 2026, 4:56 PM UTC.