M2.7 earthquake 7 km N of Outlook, Washington

A magnitude 2.7 earthquake struck 7 km N of Outlook, Washington on Sun, Sep 19, 1999, 4:11 AM PDT (11:11 UTC), 11 km (7 mi) below the surface.

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
2.73	ML, local (Richter)	Pacific Northwest Seismic Network	Preferred · Final · ±0.14516462410971664 · 57 stations
3.2	Md, duration	USGS National Earthquake Information Center	Reviewed

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: 7 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 uw10483958 (also filed as usp0009en5). Read Sun, Oct 4, 2026, 7:56 PM UTC.