Low sulfur emissions mean a new focus on a different volcanic gas

  • A USGS pilot and Hawaiian Volcano Observatory gas geochemist prepare to conduct a test flight of an unmanned aerial system (UAS) on Kilauea Volcano in November 2018. This UAS was outfitted with a prototype miniaturized multi-gas sensor for the detection of volcanic gases emitted by Kilauea, including sulfur dioxide and carbon dioxide. (Patricia Nadeau/USGS)

VOLCANOES NATIONAL PARK — With the end of Kilauea’s 2018 lower East Rift Zone eruption, Hawaii Island was able, at long last, to say goodbye to strong vog — volcanic smog produced by voluminous sulfur dioxide (SO2) emissions.