May 8, 2024 — Kīlauea gravity survey
![Color photograph of instruments measuring gravity on volcano](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/multimediaFile-4049.jpeg?itok=pE4gq0hk)
Detailed Description
Gravity measurements detect subsurface mass change—for example, magma accumulation or removal beneath the surface. In this way, gravity is a way of detecting changes in the magma reservoir that might otherwise be hidden. This photo shows two gravimeters used one-at-a-time to take measurements. USGS photo by A. Ellis.
Sources/Usage
Public Domain.