USGS scientists, Laszlo Kestay and Greg Vaughan, in Hawaii studying vo

By Astrogeology Science Center 2018 (approx.)

USGS scientists, Laszlo Kestay and Greg Vaughan, in Hawaii studying volcanoes

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USGS scientists, Laszlo Kestay and Greg Vaughan, in Hawaii studying volcanoes.

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Public Domain.