Oregon earthquakes

M1.6 earthquake 19 km NNW of Irrigon, Oregon

A magnitude 1.6 earthquake struck 19 km NNW of Irrigon, Oregon on Tue, Nov 4, 1975, 11:46 AM PST (19:46 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M1.9 14 km NNE of West Richland, Washington. This one was a foreshock.

Irrigon forecastMore in Oregon

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), micro
Local time
UTC
1975-11-04 19:46:44 UTC
Depth
18.0 km (11.2 mi), shallow
Epicenter
46.061° N, 119.568° W
Region
Oregon
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 1.0 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
228°, poorly surrounded by stations
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: 11 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.914 km NNE of West Richland, Washington · 18585 days ago · 0 km deep · 46 km away
  2. 2.915 km WNW of Othello, Washington · 18583 days ago · 3 km deep · 93 km away
  3. 1.814 km NNE of West Richland, Washington · 18574 days ago · 0 km deep · 46 km away
  4. 1.94 km SSE of Vantage, Washington · 18563 days ago · 6 km deep · 99 km away
  5. 1.914 km NNE of West Richland, Washington · 18561 days ago · 0 km deep · 46 km away
  6. 1.514 km SSW of Othello, Washington · 18540 days ago · 24 km deep · 76 km away
  7. 1.612 km NNW of Basin City, Washington · 18532 days ago · 0 km deep · 75 km away
  8. 2.12 km NNW of Connell, Washington · 18531 days ago · 9 km deep · 87 km away
  9. 2.712 km NNW of Basin City, Washington · 18529 days ago · 4 km deep · 75 km away
  10. 2.311 km NNW of Basin City, Washington · 18528 days ago · 4 km deep · 74 km away
  11. 2.012 km NNW of Basin City, Washington · 18526 days ago · 5 km deep · 75 km away

Before

  1. 1.615 km SE of Desert Aire, Washington · 18588 days ago · 20 km deep · 59 km away
  2. 1.94 km NW of Connell, Washington · 18594 days ago · 4 km deep · 87 km away
  3. 2.43 km NNW of Connell, Washington · 18606 days ago · 5 km deep · 87 km away
  4. 2.24 km WNW of Connell, Washington · 18606 days ago · 12 km deep · 85 km away
  5. 1.714 km NNE of West Richland, Washington · 18607 days ago · 0 km deep · 46 km away
  6. 2.35 km WNW of Connell, Washington · 18610 days ago · 11 km deep · 85 km away
  7. 2.26 km NW of Connell, Washington · 18610 days ago · 10 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10862148. Read Wed, Sep 23, 2026, 4:24 AM UTC.