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RAS Earth ScienceФизика Земли Izvestiya, Physics of the Solid Earth

  • ISSN (Print) 0002-3337
  • ISSN (Online) 3034-6452

Application of the Seismic Interferometry Method for Studying the Earth’s Inner Core

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PII
S0002333725020012-1
DOI
10.31857/S0002333725020012
Publication type
Article
Status
Published
Authors
O. A. Usoltseva
  • Affiliation: Sadovsky Institute of Geospheres Dynamics of Russian Academy of Sciences
V. M. Ovchinnikov
  • Affiliation: Sadovsky Institute of Geospheres Dynamics of Russian Academy of Sciences
Volume/ Edition
Volume / Issue number 2
Pages
3-18
Abstract
For a more detailed description of the dynamic processes and determination of the properties of the inner core regions, inaccessible to study by traditional methods, the seismic interferometry method, which is based on the technique of cross-correlation analysis of time series for different types of data, was applied in this work. Cross-correlation analyses of the seismic coda window with a start three hours after a strong event and the end 10 hours later are performed for all possible pairs of more than 300 stations and 6 large earthquakes (for each separately) occurring between 2013 and 2024. Synthetic cross-correlograms are calculated for models with different attenuation and an additional boundary in the inner core. Four different types of inner core studies by seismic interferometry were carried out: global, regional, station latitude-dependent, and calendar time-dependent. The stability of the PKIKPPPKIKP wave on global correlograms, the possibility of its observation in areas with high and low density of seismic stations, the dependence of the wave travel time on the angle between the wave direction and the Earth rotation axis, and the stationarity of the wave for the time period from 2013 to 2024 were demonstrated.
Keywords
волна PKIKPPKIKP поздняя кода глобальные кросс-коррелограммы анизотропия
Date of publication
25.12.2024
Year of publication
2024
Number of purchasers
0
Views
15

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