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Kīlauea caldera gas mapping—August 3, 2021

Detailed Description

An HVO scientist uses a syringe to capture a sample from an area within Kīlauea caldera that was identified as emitting elevated levels of the volcanic gas carbon dioxide. The sample is transferred to a gas sample bag, which will later be taken to a lab for chemical analyses. USGS photo by K. Mulliken on August 3, 2021.


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