M2.8 earthquake 1 km SW of Spencer, Oklahoma

A magnitude 2.8 earthquake struck 1 km SW of Spencer, Oklahoma on Sun, Oct 23, 2011, 2:58 AM CDT (07:58 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.2 0 km SSW of Spencer, Oklahoma. This one was a foreshock.

Map

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

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

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 83 in the 60 days after this one and 5 in the 30 days before it.

The first 60 of 83.

From the USGS Earthquake Hazards Program and its partner networks, event usp000j9rg (also filed as us2011sjaw). Read Tue, Sep 22, 2026, 8:27 PM UTC.