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Related Experiment Videos

An informative solution to a seismological inverse problem.

F Gilbert1, A Dziewonski, J Brune

  • 1Institute of Geophysics & Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, Calif. 92037.

Proceedings of the National Academy of Sciences of the United States of America
|May 1, 1973
PubMed
Summary
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Seismic travel times require adjustments: add 2 seconds for P phases and 4 seconds for S phases. Earth

Area of Science:

  • Geophysics
  • Seismology

Background:

  • Seismic travel time data is crucial for understanding Earth's internal structure.
  • Existing models may not fully account for all seismic wave propagation complexities.

Purpose of the Study:

  • To refine seismic travel time calculations for P and S phases.
  • To present new data on Earth's core and mantle dimensions.
  • To analyze the relationship between measurement error and data resolution in seismology.

Main Methods:

  • Analysis of seismic wave travel times.
  • Interpretation of seismic evidence to determine core radii.
  • Data presentation on resolving power versus measurement error for the Earth's mantle.

Main Results:

Related Experiment Videos

  • Preliminary findings suggest adding 2 seconds to P-phase tabular travel times.
  • Preliminary findings suggest adding 4 seconds to S-phase tabular travel times.
  • Earth's inner core radius estimated at 1229-1250 km; outer core radius at 3482-3485 km.

Conclusions:

  • Adjustments to seismic travel time tables are necessary for improved accuracy.
  • Seismic data provides key insights into the dimensions of Earth's inner and outer cores.
  • Understanding the trade-off between resolving power and measurement error is vital for mantle studies.