Usually, the earth-moving events on an autumn weekend in Oklahoma are at the college football stadiums in Norman and Stillwater.

But on this Saturday and Sunday, the earth moved — at least 23 times — and football was not involved.

The quakes, powerful by Midwestern standards, shook towns about an hour’s drive northeast of Oklahoma City. They began early Saturday and continued intermittently through the weekend.

Late Saturday night, the area experienced the strongest earthquake ever recorded in the state. No serious injuries were reported, but minor damage to roads and buildings was reported, according to the Sheriff’s Department in Lincoln County, the epicenter for many of the quakes.