Posted by Jane, conservator with the Antarctic Heritage Trust
Date: 19th May 2011
Wind Speed: 20 knots
Temp with wind chill: -40°C
Sun Dog between Mount Erebus and Mount Terror © AHT/Jane
We were treated to a rare sight just before the sun left us a few weeks ago. A really spectacular sun dog was visible when the sun was low beside Mount Erebus. Sun dogs are seen as a ring of light or halo around the sun with bright spots on either side. They are often seen in Antarctica when small ice crystals are blown up into the air. As they fall towards the ground, they align vertically and act as prisms which defract the light creating the effect. It is a really spectacular sight which we will unfortunately not see again for some time!