Kīlauea Gravity Survey - April 2022

HVO scientists took ​GPS measurements at multiple locations on the floor of Kīlauea caldera during the recent gravity survey. By comparing the measurements made at these benchmarks with survey data from previous dates, HVO scientists can ​correct for any uplift or subsidence when estimating the change of mass ​from their gravity measurements. The results of this survey will be interesting given the activity at the summit of Kīlauea over the past several years. USGS photo by A. Ellis.