Oregon earthquakes

M1.6 earthquake 8 km SW of Vernonia, Oregon

A magnitude 1.6 earthquake struck 8 km SW of Vernonia, Oregon on Thu, Aug 20, 2026, 10:56 AM PDT (17:56 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.8 20 km E of Castle Rock, Washington. This one was a foreshock.

Vernonia 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 (ML, local (Richter)), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2026-08-20 17:56:17 UTC
Depth
-0.4 km (-0.3 mi), shallow
Epicenter
45.805° N, 123.278° 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 1.1 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.25
Depth from
From location
Station coverage gap
172°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 since this one and 6 in the 30 days before it.

After

  1. 1.827 km N of Amboy, Washington · 37 days ago · 6 km deep · 73 km away
  2. 1.632 km N of Amboy, Washington · 28 days ago · 10 km deep · 83 km away
  3. 3.820 km E of Castle Rock, Washington · 26 days ago · 18 km deep · 69 km away · felt by 1,025
  4. 1.720 km E of Castle Rock, Washington · 15 days ago · 17 km deep · 69 km away
  5. 2.010 km SSE of Scappoose, Oregon · 14 days ago · 23 km deep · 38 km away
  6. 2.227 km ENE of Yacolt, Washington · 13 days ago · 10 km deep · 94 km away · felt by 1
  7. 1.531 km E of Kelso, Washington · 12 days ago · 14 km deep · 74 km away
  8. 1.537 km NNE of Amboy, Washington · 11 days ago · -2 km deep · 94 km away
  9. 1.718 km N of Amboy, Washington · 10 days ago · 10 km deep · 72 km away
  10. 2.038 km NNE of Amboy, Washington · 6 days ago · 0 km deep · 95 km away
  11. 1.638 km NNE of Amboy, Washington · 2 days ago · 3 km deep · 95 km away

Before

  1. 2.337 km NNE of Amboy, Washington · 46 days ago · -2 km deep · 95 km away
  2. 1.537 km NNE of Amboy, Washington · 64 days ago · 0 km deep · 95 km away
  3. 1.620 km E of Castle Rock, Washington · 66 days ago · 17 km deep · 70 km away
  4. 1.638 km NE of Amboy, Washington · 69 days ago · 5 km deep · 97 km away
  5. 1.511 km ENE of East Cathlamet, Washington · 69 days ago · 1 km deep · 47 km away
  6. 1.69 km S of Mossyrock, Washington · 72 days ago · 19 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw714082252. Read Thu, Oct 1, 2026, 2:31 PM UTC.