Kīlauea Gravity Survey - April 2022

Over several weeks in April, USGS Hawaiian Volcano Observatory scientists, along with visiting scientist from other volcano observatories, conducted ​the annual Kīlauea microgravity survey. Gravimeters measure gravitation attraction and they help scientists detect subtle changes in gravity caused by magma movements (learn more in this "Volcano Watch" article: https://www.usgs.gov/news/volcano-watch-research-great-gravity-kilauea-…). USGS scientists also installed new continuous, telemetered gravimeters, on the floor of Kīlauea caldera will allow HVO to monitor changes in gravity real-time. USGS photo by A. Ellis.