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Kīlauea summit eruption in Halemaʻumaʻu crater - September 30, 2021

Detailed Description

On September 30, 2021, a Hawaiian Volcano Observatory gas scientist takes notes based on the spectra being displayed by the field laptop, which is connected to a FTIR spectrometer on the rim of Halema‘uma‘u crater. The FTIR is measuring the composition of volcanic gases being emitted during an eruption within Halema‘uma‘u, at Kīlauea summit, by measuring how the plume absorbs infrared energy. USGS photo by P. Nadeau. 


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