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Showing 1–9 of 9 results
Advanced filters: Author: Hrvoje Tkalčić Clear advanced filters

  • Observations of seismic waves that traverse the Earth’s inner core as shear waves are critical to understand inner core properties. Here, the authors present several seismological observations of shear waves and estimate an absolute shear wave speed in the inner core.

    • Thuany Costa de Lima
    • Thanh-Son Phạm
    • Hrvoje Tkalčić
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-10

  • Earth’s inner core rotates at a different rate than the mantle, and discrepancies exist between rotation rates derived from geophysical observations and geodynamical simulations. An inverse analysis of seismic data from repeating earthquakes over the past 50 years suggests that the rotation rate of the inner core fluctuates on decadal timescales.

    • Hrvoje Tkalčić
    • Mallory Young
    • Malcolm Sambridge
    Research
    Nature Geoscience
    Volume: 6, P: 497-502

  • A method that uses intersource correlograms measured by a single-station seismograph to constrain planetary interiors is presented. Applied to Mars, it measures a core radius of 1,812 ± 20 km, consistent with InSight direct-seismic-wave measurements. Such a method is useful in planetary exploration where the deployment of a full network of seismographs is unlikely.

    • Sheng Wang
    • Hrvoje Tkalčić
    Research
    Nature Astronomy
    Volume: 6, P: 1272-1279

  • The authors detect 47 hitherto unreported low-frequency marsquakes originating from Cerberus Fossae at all times of the Martian day. The matched filter technique confirms repetitive events implying that the Martian mantle is dynamically active.

    • Weijia Sun
    • Hrvoje Tkalčić
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-9

  • Seismological advances are presented and summarized to study the Earth’s core.

    • Lauren Waszek
    • Jessica Irving
    • Hrvoje Tkalčić
    Comments & OpinionOpen Access
    Nature Communications
    Volume: 14, P: 1-3