Yesterday, late afternoon, early evening, I was out on the deck prepping the grill for a bbq. I heard what sounded like thunder in the distance. I went out towards the lake side of the deck and heard what sounded like an underwater explosion. Scared the hell out of me as after the eruption, I heard the ice crack, splashing water near the shore and the dock and boat lift creaked. I have lived in the Wisconsin Northwoods part time for 27 years and have heard the lake "burp" before but nothing like this. It continued periodically until about 10 pm when I took the dog out for the last time and went to bed. My wife took the dog out this morning and said the underwater thunder is still happening and she hears ice breaking and water splashing. I get it that it is a weird winter, but I have never heard this before and am wondering if anybody else is seeing/hearing this. And no.....I had not had any cocktails yet when it happened.