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Khabre desk
Recent reporting, analysis and explainers from the Geophysics desk.
science
A Nature study links broad, multidecadal changes in Earth’s day length to gravitational torque from the inner core. Its model-based reconstruction combines seismic estimates of inner-core rotation with core-flow models derived from changes in Earth’s magnetic field.
science
A Nature study models changes in Earth’s day length from 1964 to 2019 and finds that gravitational torque associated with the inner core can drive the broad multidecadal variations. In the models, electromagnetic or topographic torques at the core–mantle boundary tend to oppose that motion.