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Arriving Yesterday

Sun halos and a rare lower-tangential arc (bright area above the wing) surround a Twin Otter aircraft carrying equipment and personnel to Antarctica’s “Yesterday Camp”—so-named because it sits just east of the International Dateline. There, Rick Aster (Colorado State Univ.), Peter Bromirski (Scripps Institution of Oceanography), Doug Bloomquist (PASSCAL) and Ralph Stephen (WHOI) installed a seismometer as part of a project to measure vibration in the ice caused by wind and waves. Overall, the team installed 34 broadband seismometers on the Ross Ice Shelf to collect data over a two-year period to identify areas at risk of ice shelf collapse.(Photo by Ralph Stephen, Woods Hole Oceanographic Institution)