Washington earthquakes

M1.7 earthquake 15 km S of Ephrata, Washington

A magnitude 1.7 earthquake struck 15 km S of Ephrata, Washington on Sat, Feb 16, 1985, 5:51 AM PST (13:51 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.1 14 km SE of Kittitas, Washington. This one was a foreshock.

Ephrata 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
1.7 (md), micro
Local time
UTC
1985-02-16 13:51:15 UTC
Depth
10.3 km (6.4 mi), shallow
Epicenter
47.180° N, 119.567° 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 1.6 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.16
Depth from
Operator assigned
Station coverage gap
139°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 2.114 km SE of Kittitas, Washington · 15192 days ago · 4 km deep · 64 km away
  2. 2.011 km ESE of Mansfield, Washington · 15186 days ago · 0 km deep · 64 km away
  3. 1.93 km ESE of Entiat, Washington · 15174 days ago · 0 km deep · 70 km away
  4. 3.32 km NE of Lind, Washington · 15173 days ago · 3 km deep · 77 km away
  5. 1.915 km NNW of Vantage, Washington · 15166 days ago · -1 km deep · 42 km away
  6. 2.314 km SSW of Vantage, Washington · 15160 days ago · 3 km deep · 55 km away
  7. 1.812 km W of Entiat, Washington · 15153 days ago · 2 km deep · 82 km away
  8. 1.513 km ENE of Mansfield, Washington · 15144 days ago · 0 km deep · 76 km away
  9. 1.57 km NNW of Entiat, Washington · 15140 days ago · 3 km deep · 80 km away
  10. 2.73 km NNE of Waterville, Washington · 15139 days ago · 0 km deep · 66 km away
  11. 2.024 km SE of Kittitas, Washington · 15136 days ago · 2 km deep · 66 km away

Before

  1. 2.24 km WNW of Waterville, Washington · 15198 days ago · -1 km deep · 68 km away
  2. 2.316 km NW of Benton City, Washington · 15199 days ago · 19 km deep · 88 km away
  3. 2.613 km ESE of Mansfield, Washington · 15200 days ago · 0 km deep · 68 km away
  4. 2.13 km E of Entiat, Washington · 15204 days ago · 0 km deep · 71 km away
  5. 1.67 km WNW of Quincy, Washington · 15205 days ago · 0 km deep · 29 km away
  6. 2.315 km NW of Vantage, Washington · 15207 days ago · 9 km deep · 43 km away
  7. 2.67 km WSW of Mattawa, Washington · 15207 days ago · 6 km deep · 60 km away
  8. 2.314 km NNW of Vantage, Washington · 15207 days ago · 0 km deep · 42 km away
  9. 1.624 km SE of Kittitas, Washington · 15208 days ago · 1 km deep · 66 km away
  10. 1.86 km NW of Desert Aire, Washington · 15209 days ago · 3 km deep · 61 km away
  11. 1.99 km NW of Vantage, Washington · 15209 days ago · 0 km deep · 43 km away
  12. 2.76 km NW of Desert Aire, Washington · 15209 days ago · 4 km deep · 61 km away
  13. 3.314 km NNW of Vantage, Washington · 15210 days ago · 0 km deep · 41 km away
  14. 1.817 km S of Ephrata, Washington · 15210 days ago · 0 km deep · 2 km away
  15. 2.214 km NE of Richland, Washington · 15211 days ago · 1 km deep · 93 km away
  16. 1.64 km ESE of Entiat, Washington · 15214 days ago · 5 km deep · 69 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10186973. Read Tue, Sep 22, 2026, 2:55 PM UTC.