So there I am on my lunch break reading a book, when I feel the ground tremble beneath me. At the time, I assumed that someone had dropped something heavy in the mail room next door, but later I learned the true cause: an ice quake emanating from Lake Mendota which geologists measured as 0.2 on the Richter scale.
Channel 3000 reported that the ice quake was too small to cause any damage, but experts said it was the strongest ice quake the area has seen in nearly a decade.
According to the Isthmus:
Such events are not without precedent. There’s a lot of expansion and contraction happening out on the big ice sheets that cover Madison’s lakes in winter. One of the most dramatic such occurrences happened a little before noon on Jan.15, 1948, when seismographs measured a tremor at 3.8 on the Richter scale.