Antipodal Seismic Observation and Sensitivity Kernel for the Liquid Region on the Earth’s Inner Core

DOI Web Site 参考文献45件 オープンアクセス
  • Seiji Tsuboi
    Japan Agency for Marine-Earth Science and Technology, Yokosuka-shi 237-0061, Kanagawa, Japan
  • Rhett Butler
    Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa, Honolulu, HI 96822, USA

書誌事項

公開日
2024-12-06
資源種別
journal article
権利情報
  • https://creativecommons.org/licenses/by/4.0/
DOI
  • 10.3390/geosciences14120333
公開者
MDPI AG

説明

<jats:p>It is considered that a part of the inner core surface where iron in the fluid outer core is precipitated may have melted and formed a mushy region, but its position is not well understood seismologically. We recently analyzed seismic waveforms observed at the antipodal station of the seismic source and showed that there are precursors to the PKIIKP phase reflected beneath the inner core boundary. It has been found that this precursory wave can be modeled as a reflection under the liquid/solid interface at a depth of 100 km below the inner core boundary. Here, we use these precursor waves observed at the antipodal station (>179°). The sensitivity kernel of the amplitude of these precursor waves for the shear wave velocity structure on the inner core surface was calculated by the adjoint method, using theoretical seismic waveforms. Our results might be used to locate regions of the inner core surface where the shear wave velocity may be close to zero.</jats:p>

収録刊行物

  • Geosciences

    Geosciences 14 (12), 333-, 2024-12-06

    MDPI AG

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