M1.7 earthquake 9 km SE of Condon, Oregon
A magnitude 1.7 earthquake struck 9 km SE of Condon, Oregon on Fri, Sep 11, 1987, 10:39 AM PDT (17:39 UTC), -1 km (-1 mi) below the surface.
A larger quake followed: M2.7 11 km ESE of Condon, Oregon. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.7 (md), micro
- Local time
- UTC
- 1987-09-11 17:39:26 UTC
- Depth
- -0.8 km (-0.5 mi), shallow
- Epicenter
- 45.185° N, 120.082° 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, 11.5 km in depth
- Magnitude uncertainty
- ±0.21
- Depth from
- Operator assigned
- Station coverage gap
- 177°
- Stations used
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 13 in the 30 days before it.
After
- 2.711 km ESE of Condon, Oregon · 14238 days ago · 19 km deep · 2 km away
- 2.010 km SE of Condon, Oregon · 14226 days ago · 2 km deep · 1 km away
Before
- 2.410 km ESE of Condon, Oregon · 14259 days ago · -1 km deep · 2 km away
- 2.312 km ESE of Condon, Oregon · 14259 days ago · 17 km deep · 4 km away
- 1.910 km ESE of Condon, Oregon · 14260 days ago · 16 km deep · 1 km away
- 3.110 km ESE of Condon, Oregon · 14260 days ago · 12 km deep · 1 km away
- 2.48 km ESE of Spray, Oregon · 14263 days ago · 12 km deep · 52 km away
- 1.817 km NNW of Shaniko, Oregon · 14275 days ago · 18 km deep · 60 km away
- 1.518 km E of Maupin, Oregon · 14276 days ago · 15 km deep · 60 km away
- 1.818 km NNW of Shaniko, Oregon · 14277 days ago · 13 km deep · 60 km away
- 1.816 km E of Maupin, Oregon · 14279 days ago · 22 km deep · 62 km away
- 1.716 km E of Maupin, Oregon · 14279 days ago · 20 km deep · 62 km away
- 2.117 km ESE of Maupin, Oregon · 14281 days ago · 24 km deep · 61 km away
- 1.516 km E of Maupin, Oregon · 14284 days ago · 16 km deep · 62 km away
- 1.616 km E of Maupin, Oregon · 14285 days ago · 24 km deep · 62 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10223408. Read Tue, Sep 22, 2026, 9:30 PM UTC.