May 22, 2025 — FTIR at Kīlauea summit
Detailed Description
A USGS Hawaiian Volcano Observatory geologist uses an FTIR (Fourier transform infrared spectrometer) to measure the chemical composition of volcanic gas during cycles of spattering and seismic tremor at the active vent at Kīlauea summit on May 22, 2025. USGS photo by M. Patrick.
Sources/Usage
Public Domain.