Lava Sampling Ñ Geologists at the Hawaiian Volcano Observatory (HVO) take lava samples as close to a vent as possible. Once the sample is scooped from the p?hoehoe lobe, it is quenched in water to stop the growth of any crystals and to preserve the composition of the liquid lava. Once cooled, the sample is sent first to UH Hilo for basic analysis before being sent for fuller analysis by a lab on the mainland. This data is used, with HVO's geophysical monitoring data, as another way to assess any changes that may be occurring within K?lauea volcano. Credit: USGS

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Location: Kilauea Volcano
Photo credit: © digitaleye / USGS / Alamy / Afripics
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