Lake Michigan Ice Cave
March 27, 2014
Photographer: Ken Scott; Ken's Facebook page
Summary Author: Ken Scott; Jim Foster
Through late February, over 85 percent of the Great Lakes were ice covered. This hasn't happened in more than 20 years. Since ice cover on the Great Lakes was first officially measured, in 1974, the biggest ice year was 1979 when nearly 95 percent of the lakes were frozen over.
The above photo shows an ice cave off the northeast shore of Lake Michigan. All of the ice here is frozen lake water. Both big waves and prolonged cold are needed to form such a cave. They actually occur almost every year, but only one other time in my 30 years of observing Lake Michigan has it frozen out far enough to access the cave's lake-facing side. Photo taken not far from Leland, Michigan, on February 14, 2014.
Photo details: Camera Model: NIKON D600; Focal Length: 14.0mm (35mm equivalent: 14mm); Aperture: f/11.0; Exposure Time: 0.0031 s (1/320); ISO equiv: 200.