Kīlauea summit gravity survey - September 23, 2020
By Kīlauea
Detailed Description
A gravimeter makes a measurement at a benchmark situated among lava flows erupted in 1919. The strength of gravity varies with both elevation and the amount of mass beneath the instrument. Changes in mass can indicate changes in the amount of magma entering Kīlauea's magma reservoirs. USGS photo by A. Flinders.
Sources/Usage
Public Domain.