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  • Growing mountains or shifting ground: What is going on in Earth’s inner core?

    A new study of Earth’s inner core used seismic data from repeating earthquakes, called doublets, to find that refracted waves, blue, rather than reflected waves, purple, change over time – providing the best evidence yet that Earth’s inner core is rotating

    A new study of Earth’s inner core used seismic data from repeating earthquakes, called doublets, to find that refracted waves, blue, rather than reflected waves, purple, change over time – providing the best evidence yet that Earth’s inner core is rotating.

    Graphic by Michael Vincent

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  • To reach Xiaodong Song, call 217-714-5125; email xsong@illinois.edu.

    The paper “Origin of temporal changes of inner-core seismic waves” is available online and from the U. of I. News Bureau. DOI: 10.1016/j.epsl.2020.116267