HVO gas scientists collected helium samples

As part of routine monitoring efforts, HVO gas scientists collected helium samples from fumaroles in the Sulphur Banks, or Ha‘akulamanu, area of Hawai‘i Volcanoes National Park on September 30, 2020. Helium can pass through the glass of typical gas sampling bottles, so copper tubing is necessary for the specialized sample. Ratios of different helium isotopes tell scientists if the source of helium is deeper (from the mantle) or shallower (from the crust). USGS photo by T. Elias.