Washington earthquakes

M1.5 earthquake 7 km NW of Ault Field, Washington

A magnitude 1.5 earthquake struck 7 km NW of Ault Field, Washington on Mon, Jul 9, 1979, 8:14 AM PDT (15:14 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M2.7 6 km N of Jamestown, Washington. This one was a foreshock.

Ault Field 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), micro
Local time
UTC
1979-07-09 15:14:56 UTC
Depth
11.9 km (7.4 mi), shallow
Epicenter
48.391° N, 122.742° 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, 3.1 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
116°
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.90 km SE of Union Hill-Novelty Hill, Washington · 17238 days ago · 18 km deep · 96 km away
  2. 1.910 km NW of Orcas, Washington · 17237 days ago · 9 km deep · 37 km away
  3. 1.53 km NE of Lake Ketchum, Washington · 17236 days ago · 2 km deep · 33 km away
  4. 1.65 km ENE of Acme, Washington · 17234 days ago · -1 km deep · 59 km away
  5. 1.53 km N of Union Hill-Novelty Hill, Washington · 17228 days ago · 21 km deep · 92 km away
  6. 2.33 km WSW of Snohomish, Washington · 17226 days ago · 23 km deep · 70 km away
  7. 1.83 km ENE of Eastmont, Washington · 17226 days ago · 23 km deep · 70 km away
  8. 1.5Washington · 17217 days ago · 13 km deep · 28 km away
  9. 1.57 km ESE of Deming, Washington · 17216 days ago · 0 km deep · 65 km away
  10. 2.76 km N of Jamestown, Washington · 17212 days ago · 50 km deep · 34 km away

Before

  1. 1.97 km SE of Hamilton, Washington · 17250 days ago · 4 km deep · 63 km away
  2. 1.53 km ENE of Carlsborg, Washington · 17253 days ago · 47 km deep · 43 km away
  3. 1.51 km NNW of Lofall, Washington · 17255 days ago · 20 km deep · 63 km away
  4. 2.04 km NNW of Deming, Washington · 17265 days ago · 11 km deep · 64 km away
  5. 1.715 km SSE of Friday Harbor, Washington · 17266 days ago · 47 km deep · 16 km away
  6. 2.324 km SE of Glacier, Washington · 17269 days ago · 0 km deep · 89 km away
  7. 1.62 km NW of Anacortes, Washington · 17275 days ago · 16 km deep · 17 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10850183. Read Mon, Sep 28, 2026, 10:45 AM UTC.