Oregon earthquakes

M1.9 earthquake 3 km WSW of Falls City, Oregon

A magnitude 1.9 earthquake struck 3 km WSW of Falls City, Oregon on Tue, Oct 8, 1991, 1:59 AM PDT (08:59 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.1 8 km ENE of North Plains, Oregon. This one was a foreshock.

Falls City 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
1.9 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-10-08 08:59:59 UTC
Depth
20.8 km (12.9 mi), shallow
Epicenter
44.858° N, 123.479° 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, 1.4 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
168°
Stations used
30

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 0 in the 30 days before it.

After

  1. 1.78 km N of Bethany, Oregon · 12768 days ago · 18 km deep · 99 km away
  2. 3.18 km ENE of North Plains, Oregon · 12768 days ago · 20 km deep · 98 km away
  3. 1.58 km N of Bethany, Oregon · 12768 days ago · 19 km deep · 99 km away
  4. 1.79 km N of Bethany, Oregon · 12768 days ago · 20 km deep · 99 km away
  5. 2.88 km N of Bethany, Oregon · 12768 days ago · 18 km deep · 99 km away
  6. 1.79 km N of Bethany, Oregon · 12766 days ago · 19 km deep · 99 km away
  7. 3.08 km N of Bethany, Oregon · 12765 days ago · 20 km deep · 98 km away
  8. 1.88 km N of Bethany, Oregon · 12764 days ago · 19 km deep · 99 km away
  9. 1.610 km NE of North Plains, Oregon · 12764 days ago · 17 km deep · 100 km away
  10. 2.18 km N of Bethany, Oregon · 12764 days ago · 20 km deep · 98 km away
  11. 1.81 km NE of Canby, Oregon · 12745 days ago · 25 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10279313. Read Fri, Oct 2, 2026, 8:58 AM UTC.