Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Seismic Waves within Earth's Outer Core: Multiple Reflection.

E R Engdahl

    Science (New York, N.Y.)
    |July 19, 1968
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Explosion effects and earthquakes in the amchitka island region.

    Science (New York, N.Y.)·1971
    Same author

    Seismic waves reflected from the Earth's inner core.

    Nature·1970
    Same author

    Seismic Waves Reflected from Discontinuities within Earth's Upper Mantle.

    Science (New York, N.Y.)·1969
    Same journal

    Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

    Science (New York, N.Y.)·2026
    Same journal

    Local signals, systemic decline.

    Science (New York, N.Y.)·2026
    Same journal

    The mechanics of liver regeneration.

    Science (New York, N.Y.)·2026
    Same journal

    Computing in a memory with physics.

    Science (New York, N.Y.)·2026
    Same journal

    Retraction.

    Science (New York, N.Y.)·2026
    Same journal

    Making time.

    Science (New York, N.Y.)·2026
    See all related articles

    Seismic wave reflections within Earth's outer core provide new insights into its structure. Current models may require minor velocity adjustments, but the core radius appears stable.

    Area of Science:

    • Geophysics
    • Seismology
    • Earth Science

    Background:

    • Seismic waves, particularly those reflecting within Earth's outer core, offer valuable data for understanding deep Earth structure.
    • Previous seismic studies have primarily focused on wave behavior near the core-mantle boundary.

    Purpose of the Study:

    • To analyze seismic wave reflections within the outer core to refine models of its physical properties.
    • To investigate the consistency of observed seismic wave arrivals with current geodynamic models.

    Main Methods:

    • Analysis of seismic wave reflections, including multiple P-wave reflections (P P P P) within the outer core.
    • Comparison of observed wave arrival times with predictions from established Earth core models.

    Main Results:

    Related Experiment Videos

    • Seismic waves reflecting up to four times within the outer core are routinely observed.
    • Observations align with theoretical expectations for wave paths near grazing incidence at the core-mantle boundary.
    • Certain observed wave arrivals necessitate minor adjustments to outer-core velocities in current models.
    • The data do not support significant changes (±10 km) to the accepted core radius of 3473 km.

    Conclusions:

    • The study confirms the utility of multiple seismic wave reflections for probing the outer core.
    • Existing seismic models may require fine-tuning of outer-core velocities.
    • The Earth's outer core radius is robustly constrained by the analyzed seismic data.