Another small earthquake was detected Saturday in north Alabama, the U.S. Geological Survey said.

That's at least the 12th earthquake to be detected in the northern half of the state since February.

Like all the others, the earthquake had a low magnitude and occurred miles below the earth's surface so it would not have been noticed.

Saturday's quake occurred about 8:58 a.m. Central time in the Weiss Lake area in Cherokee County. It measured a 1.9 magnitude and was detected more than three miles below the earth's surface, according to the USGS.

The quake was about 17 miles northeast of Gadsden and 20 miles south of Fort Payne.

Another earthquake also occurred in north Alabama on Saturday - a magnitude 2.2 about 10 miles west southwest of Decatur.