Hawaiian Volcano Observatory field geologists track activity at fissure 8 (pictu
Detailed Description
Hawaiian Volcano Observatory field geologists track activity at fissure 8 (pictured in the background). Crews collect fissure 8 tephra (Pele's hair, pumice, and other lightweight volcanic glass fragments) for geochemical analyses and characterization of changes in lava fountain behavior.
Sources/Usage
Public Domain.