Earth's Inner Core Rotation Slows, Impacting Day Length
Researchers from the University of Southern California have found that Earth's inner core has been slowing down since around 2010, altering the length of days by fractions of a second. This slowdown is attributed to convection within the liquid iron outer core and gravitational forces in the mantle. The findings, based on seismic data from earthquakes and nuclear tests, were published in the journal Nature.