Topic: plate motion

Bernhard Steinberger examines whether volcanic hotspots provide a fixed reference frame for plate motion. The discussion combines paleomagnetic records, island-chain ages and mantle-flow models, showing how plumes can drift with mantle circulation. Contrasting the Hawaiian and Louisville tracks helps distinguish hotspot motion from changes in plate direction and illustrates the limits of treating hotspots as stationary.

Tom Herring introduces high-precision geodetic measurements using satellite navigation, very-long-baseline interferometry and radar interferometry. He explains how improved accuracy and cheaper receivers expand studies of plate motion, earthquake-related deformation and Earth rotation, with further applications in infrastructure and agriculture.