Oregon earthquakes

M1.6 earthquake 13 km ENE of Tillamook, Oregon

A magnitude 1.6 earthquake struck 13 km ENE of Tillamook, Oregon on Fri, Jul 26, 1991, 5:21 AM PDT (12:21 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M2.8 8 km N of Bethany, Oregon. This one was a foreshock.

Tillamook 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, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-07-26 12:21:47 UTC
Depth
22.3 km (13.9 mi), shallow
Epicenter
45.496° N, 123.687° 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 3.9 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
266°, poorly surrounded by stations
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.78 km N of Bethany, Oregon · 12851 days ago · 16 km deep · 66 km away
  2. 2.88 km N of Bethany, Oregon · 12851 days ago · 19 km deep · 66 km away
  3. 1.59 km N of Bethany, Oregon · 12848 days ago · 15 km deep · 66 km away
  4. 2.28 km N of Bethany, Oregon · 12847 days ago · 17 km deep · 66 km away
  5. 1.79 km N of Bethany, Oregon · 12847 days ago · 6 km deep · 66 km away
  6. 1.92 km SE of Donald, Oregon · 12817 days ago · 32 km deep · 75 km away

Before

  1. 1.88 km N of Bethany, Oregon · 12854 days ago · 16 km deep · 66 km away
  2. 1.88 km N of Bethany, Oregon · 12855 days ago · 17 km deep · 66 km away
  3. 2.39 km N of Bethany, Oregon · 12856 days ago · 17 km deep · 66 km away
  4. 1.78 km N of Bethany, Oregon · 12856 days ago · 16 km deep · 66 km away
  5. 2.28 km N of Bethany, Oregon · 12856 days ago · 17 km deep · 65 km away
  6. 2.28 km N of Bethany, Oregon · 12856 days ago · 16 km deep · 66 km away
  7. 3.58 km N of Bethany, Oregon · 12856 days ago · 19 km deep · 66 km away
  8. 2.48 km N of Bethany, Oregon · 12856 days ago · 17 km deep · 65 km away
  9. 2.08 km N of Bethany, Oregon · 12857 days ago · 17 km deep · 66 km away
  10. 1.58 km N of Bethany, Oregon · 12860 days ago · 16 km deep · 66 km away
  11. 1.86 km WNW of Scappoose, Oregon · 12874 days ago · 16 km deep · 65 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10282103. Read Fri, Oct 2, 2026, 6:32 AM UTC.