Snowmobiling down from upper Erebus hut. Sun behind plume. Sun behind plume. Mt. Erebus plume. Ice cave. Installing a filter rack on the crater rim. Peter Kelly, Harry Keys and Julie Calkins getting close inside an ice cave. Peter Kelly warming up pump tubing on the crater rim. Harry Keys cleaning rime ice from the video camera. Peter Kelly taking samples on the crater rim. Peter Kelly at Nausea Knob wind generator. Phil Kyle directing Harry Keys and Peter Kelly up antenna mast at Truncated Cones. Mr. Erebus on his birthday. Peter Kelly entering "helo" cave near the lower Erebus hut. Harry Keys in a new room of an ice cave near the lower Erebus hut.