This incredible footage shows the sheer scale of calving glaciers - a natural occurrence caused by the forward motion of a glacier making the end, or terminus, unstable. Fascinating to watch, the video shows giant chunks of ice falling from the glacier, crashing into the waters below.
This event, captured at the Columbia Glacier, Columbia Bay, Alaska, USA, was a far larger glacier calve that is usually witnessed in the area according to Colleen Stephens, President Stan Stephens Glacier & Wildlife Cruise. Colleen, discussing the August 1 event, said: "Columbia Glacier is in the middle of a massive retreat, so calving is frequent. "This size of an event is rare to capture or see on a tour - this is much larger than most seen."
Take a look at the footage below.