Oregon earthquakes

M1.9 earthquake 10 km ESE of Condon, Oregon

A magnitude 1.9 earthquake struck 10 km ESE of Condon, Oregon on Mon, Sep 7, 1987, 10:27 PM PDT (05:27 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M2.3 12 km ESE of Condon, Oregon. This one was a foreshock.

Condon 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), micro
Local time
UTC
1987-09-08 05:27:24 UTC
Depth
15.6 km (9.7 mi), shallow
Epicenter
45.187° N, 120.066° 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 2.8 km horizontally, 3.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
179°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 2.312 km ESE of Condon, Oregon · 14259 days ago · 17 km deep · 2 km away
  2. 2.410 km ESE of Condon, Oregon · 14259 days ago · -1 km deep · 1 km away
  3. 1.79 km SE of Condon, Oregon · 14256 days ago · -1 km deep · 1 km away
  4. 2.711 km ESE of Condon, Oregon · 14238 days ago · 19 km deep · 1 km away
  5. 2.010 km SE of Condon, Oregon · 14226 days ago · 2 km deep · 1 km away

Before

  1. 3.110 km ESE of Condon, Oregon · 14260 days ago · 12 km deep · 1 km away
  2. 2.48 km ESE of Spray, Oregon · 14263 days ago · 12 km deep · 51 km away
  3. 1.817 km NNW of Shaniko, Oregon · 14275 days ago · 18 km deep · 61 km away
  4. 1.518 km E of Maupin, Oregon · 14276 days ago · 15 km deep · 61 km away
  5. 1.818 km NNW of Shaniko, Oregon · 14277 days ago · 13 km deep · 62 km away
  6. 1.816 km E of Maupin, Oregon · 14279 days ago · 22 km deep · 63 km away
  7. 1.716 km E of Maupin, Oregon · 14279 days ago · 20 km deep · 64 km away
  8. 2.117 km ESE of Maupin, Oregon · 14281 days ago · 24 km deep · 62 km away
  9. 1.516 km E of Maupin, Oregon · 14284 days ago · 16 km deep · 63 km away
  10. 1.616 km E of Maupin, Oregon · 14285 days ago · 24 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10222418. Read Tue, Sep 22, 2026, 9:39 PM UTC.