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2 results

  • 8 - Coda Correlations

  • from Part II - Correlation Wavefields
  • Brian L. N. Kennett, Australian National University, Canberra, Andreas Fichtner
  • Book:
    Exploiting Seismic Waveforms
    Published online:
    16 November 2020
    Print publication:
    03 December 2020, pp 179-199

  • Summary

    The seismic signals from major events continue to propagate through the Earth for hours. Theapplication of correlations between seismic stations to these long codas extracts steeply travelling body waves as the main contributors to the correlation wavefield.The properties of the coda correlation depend on the differences between the seismic phases that are being correlated. As a result, the correlation wavefield of the coda emphasises seismic phases that are difficult to detect in direct excitation by a source and so can provide new information on internal structure, e.g., an improved estimate of the shear wavespeed in the inner core.

  • 3 - Carbon versus Other Light Elements in Earth’s Core

  • Edited by Beth N. Orcutt, Isabelle Daniel, Université Claude-Bernard Lyon I, Rajdeep Dasgupta, Rice University, Houston
  • Book:
    Deep Carbon
    Published online:
    03 October 2019
    Print publication:
    17 October 2019, pp 40-65
    • Chapter
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  • Summary

    This chapter reviews the geochemical and geophysical constraints on the carbon budget in the metallic core of Earth, discusses whether carbon is a dominant light element in the core, and assesses whether the core hosts the largest reservoir of carbon on Earth.