CLINTONVILLE - The reports of booming in Clintonville have quieted down.

Residents started reporting the sounds and shaking March 18 and experts detected a 1.5-magnitude earthquake about two days later.

The reports started to die down until another big boom over a week later.

There have been a few reports since then.

Four seismometers have been installed and so far confirmed a .1 magnitude earthquake March 30.

City administrator Lisa Kuss (kus) said Wednesday police have only received a handful of calls recently.

U.S. Geological Survey Geophysicist John Bellini says he's still comparing their data with resident reports but haven't found anything substantial.

He suspects the events are a swarm of small earthquakes, which is not unusual across the nation.

(Copyright 2012 by The Associated Press. All Rights Reserved.)