Kara Schmitz was relaxing at home Thursday afternoon when a loud boom broke the silence and shook her Excelsior home. "It didn't last long, maybe five seconds," Schmitz recalled, saying it sounded a ...

What are those loud pops, booms and bangs in the Lake Minnetonka area? The sounds likely are frost quakes and ice quakes, weather experts say. But even they don’t really know for sure.