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Colorful plumes - can we see volcanic gases?

Detailed Description

LERZ Fissure 8 on June 5, 2018 - The sun is behind the observer taking this photo, making the plume appear bluish due to sunlight scattering by tiny sulfate aerosols. The gas plume is against a very dark cloud background, so that no backlighting is affecting the plume view. Photo credit: Allan Lerner, USGS Volunteer