High ³He/⁴He ratios in lower East Rift Zone steaming vents precede a new phase of Kilauea 2018 eruption by 8 months.

ABSTRACT: On May 1, 2018, a magnitude 5.0 earthquake heralded the collapse of the Pu'u O'o Vent on the middle East Rift Zone (ERZ) of Kilauea Volcano, active since 1983. Increased seismicity was recorded on the middle to lower ERZ from April 30 until May 2, 2018. The active lava lakes within both Pu'u O'o Vent and Halema'uma'u Crater began to drain and the summit caldera began to deflate, with the summit collapse ending on August 2, 2018 and lower ERZ eruptive lava activity ending by 4 September 2018. Herein we report on elevated ³He/⁴He ratios in steaming vents in the lower ERZ from samples collected in early September 2017. Gas isotopic measurements were made with a new, field-portable He isotope detector capable of sub-daily monitoring of the ³He/⁴He ra

SUBMITTER: McMurtry GM 

PROVIDER: S-EPMC6694148 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature