The University of Alberta says it has solved a mystery nearly a year in the making: seismic activity that led to the ground shifting in Alberta Beach last January was caused by ice quakes.

After residents in several Alberta regions reported cracks in the ground, ice and their foundations after a quaking phenomenon Monday night, a seismologist is offering his best guess into what may have occurred.

Two seismic events confirmed after cracks discovered in ground and foundations in Alberta Beach Tuesday morning.