English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

We use a normal-mode formalism to compute the response of a spherical,self-gravitating anelastic PREM-like Earth model to various excitation sourcesat the Slichter mode period. The formalism makes use of the theory of theEarth's free oscillations based upon an eigenfunction expansion methodology. Wedetermine the complete response in the form of Green's function obtained from ageneralization of Betti's reciprocity theorem. Surficial (surface load, fluidcore pressure), internal (earthquakes, explosions) and external (object impact)sources of excitation are investigated to show that the translational motion ofthe inner-core would be best excited by a pressure acting at the coreboundaries at time-scales shorter than the Slichter eigenperiods.

Excitation of the Slichter mode by collision with a meteoroid or pressure variations at the surface and core boundaries