M4.0 earthquake 17 km SSE of Waynoka, Oklahoma

A magnitude 4.0 earthquake struck 17 km SSE of Waynoka, Oklahoma on Fri, Oct 21, 2016, 3:26 PM CDT (20:26 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.1 17 km SE of Waynoka, Oklahoma. This one was a foreshock.

Map

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

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

48 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 99 in the 60 days after this one and 56 in the 30 days before it.

The first 60 of 99.

From the USGS Earthquake Hazards Program and its partner networks, event us20007g02. Read Tue, Sep 22, 2026, 7:43 AM UTC.