M2.4 earthquake 17 km NNW of Halfway, Oregon

A magnitude 2.4 earthquake struck 17 km NNW of Halfway, Oregon on Mon, Aug 14, 2017, 10:08 PM PDT (05:08 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M3.0 22 km N of Halfway, Oregon. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.43	ML, local (Richter)	Pacific Northwest Seismic Network	Preferred · Final · ±0.166 · 7 stations
2.4	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.166 · 7 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 2 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event uw61314061 (also filed as us2000a8ay). Read Sat, Oct 3, 2026, 1:01 PM UTC.