Mt Agung (Bali) Eruption Plumes
MISR Active Aerosol Plume-Height (AAP) Project:
Mt Agung (Bali) eruption plumes seen by MISR November 29, 2017 (left) and calculated plume heights (right)
Volcanic eruptions can generate a significant amount of atmospheric aerosols that have regional to global impacts. Accurate plume heights are needed to determine the influence of volcanic eruptions, but are difficult to obtain due to the hazardous nature of eruptions. Stereo images from NASA’s Multi-Angle Imaging Spectroradiometer (MISR) make it possible to retrieve plume heights during eruptions. Multi-angle images help distinguish eruption plumes from clouds. Mt. Agung began heightened seismic activity on August 10, 2017. On November 29, 2017 MISR observed a plume reaching ~6 km. Particles were transported in two plumes (south & southwest) across Bali at an altitude of 4.5-5 km. At this altitude, the direct (ash fall) and indirect (surface temperature) effects are likely to remain local. Activity remains high at Agung, with the potential for ongoing eruptions to cause significant regional hazards to populations and aviation. Larger eruptions also pose a hazard to the busy Australia – SE Asia flight corridor.