M2.2 earthquake 20 km N of Halfway, Oregon
A magnitude 2.2 earthquake struck 20 km N of Halfway, Oregon on Mon, Aug 21, 2017, 11:33 AM PDT (18:33 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M2.6 26 km NW of New Meadows, Idaho. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.2 (ML, local (Richter)), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 2017-08-21 18:33:01 UTC
- Depth
- 4.5 km (2.8 mi), shallow
- Epicenter
- 45.068° N, 117.132° 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 9.5 km horizontally, 26.6 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 214°, poorly surrounded by stations
- Stations used
- 4
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 6 in the 30 days before it.
After
- 2.339 km WNW of White Bird, Idaho · 3319 days ago · 5 km deep · 93 km away · felt by 1
- 2.626 km NW of New Meadows, Idaho · 3312 days ago · 5 km deep · 45 km away
Before
- 3.022 km N of Halfway, Oregon · 3330 days ago · 2 km deep · 2 km away
- 1.621 km N of Halfway, Oregon · 3330 days ago · 4 km deep · 2 km away
- 2.521 km N of Halfway, Oregon · 3330 days ago · 1 km deep · 1 km away
- 2.417 km NNW of Halfway, Oregon · 3336 days ago · 15 km deep · 7 km away
- 2.621 km NNW of Halfway, Oregon · 3336 days ago · 2 km deep · 5 km away
- 3.119 km NNW of Halfway, Oregon · 3337 days ago · 8 km deep · 7 km away · felt by 1
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw61296687. Read Sat, Oct 3, 2026, 2:08 AM UTC.