MADISON, Wis. — University of Wisconsin-Madison geologists said the shaking some University of Wisconsin-Madison staffers and others felt Thursday afternoon near Lake Mendota was most likely an ice quake caused by ice shifting on Lake Mendota.
UW-Madison geologists said they recorded a tremor at 12:50 p.m. that lasted a few seconds.
Ice quakes are usually accompanied by loud cracking noises, and the university said a number of people called UW police and facilities staff to inquire about the rumbling disturbance.
Brad Bolden was fishing on Lake Mendota during the incident.