What did I just see, hear, feel?

Here's a brief followup  U.S. Geological Survey (USGS)​ and Oklahoma Geological Survey​ folks.

The latter has a reporting page for reporting unknown events.  The sensors locally are not right IN City of Altus but close. 

http://www.ou.edu/content/ogs/research/earthquakes/seismicstations.html shows them.

When you see, hear, feel something, in addition to reporting, go to the Seismic Monitoring Program and see what recorded.  The site does not display much time but

shows a couple of shakes around 5 p.m. or so.

The site up closer to Mangum, Oklahoma​ was a little more active ... 

If it's unknown, continue to report.   Please do not call 911, unless there is life or property threatened.