The moment an active glacier shed huge pieces of ice has been caught on camera.
Chris Bray was visiting the Chenega Glacier on one of his photography tours in Alaska last month.
The apparently peaceful scene was perfect for some landscape shots but Bray was focused in and recording the glacier when a loud cracking noise began.
Small pieces began to fall which escalated into larger and larger pieces falling off the glacier.
With birds fleeing, an avalanche of ice suddenly crashed into the ocean creating a huge bow wave effect.
"I had been filming this section for a while that looked particularly active and had just given up and lowered my camera when suddenly a small piece started to fall," Bray said.
"It was amazing to see the ice splintering as it hit the rocks and the huge shockwave created in the water and all the seagulls taking flight.
Although the video has no sound, Bray said he felt the shockwave go through his chest.
"When I started filming, I expected it was only going to be that first small piece of ice falling, but as I kept filming, I couldn't believe it when the entire wall of ice in my frame started to come down."
Bray battled against the shockwave to keep his small boat steady.
"I really didn't want to mess up this shot, it was epic!"