New instrument with new potential: The Absolute Quantum Gravimeter

The USGS Hawaiian Volcano Observatory’s Absolute Quantum Gravimeter is undergoing set-up, testing, and calibration before installation at the summit of Kilauea. (A. Ellis/Special to West Hawaii Today)

All objects have a mass and therefore a gravity field. Earth’s gravitational pull is slightly stronger in areas with more mass and slightly weaker in areas with less mass. Gravimeters measure gravitational attraction.