Field geologists Cheryl Ganescki and Sam Isgett make measuerments n...
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Field geologists Cheryl Ganescki and Sam Isgett make measuerments near the outflow channel at fissure 8. Sam is using a radar gun to measure speed of lava flowing at the vent exit, and Cheryl is recording high definition video to capture lava-flow processes. (Photo taken June 18)