Impact of inner core rotation on outer core flow: the role of outer core viscosity

User Interface Device Drivers Outer Core Inner Core Gadgets

Frequency Aanalysis of Annular Plates Having a Small Core and Guided Edges at Both Inner and Outer Boundaries

This paper deals with frequency analysis of annular plates having a small core and guided edges at both inner and outer boundaries. Using classical plate theory the governing differential equation of motion for the annular plate having a small core is derived and solved for the case of plate being guided at inner and outer edge boundaries. The fundamental frequencies for the first six modes of ...

Inner-core Anisotropy and Rotation

■ Abstract This paper reviews recent research focused on the Earth’s inner core. Large inner-core traveltime anomalies and the anomalous splitting of core-sensitive free oscillations strongly suggest that the inner core is anisotropic. Initial models involved a simple, constant or depth-dependent cylindrical anisotropy at a level less than a few percent. Recent observations suggest that its eas...

Viscosity & Rotation in Core-collapse Supernovae

We construct models of core-collapse supernovae in one spatial dimension, including rotation, angular momentum transport, and viscous dissipation employing an α-prescription. We compare the evolution of a fiducial 11 M⊙ non-rotating progenitor with its evolution including a wide range of imposed initial rotation profiles (1.25<P0 < 8 s, where P0 is the initial, approximately solid-body, rotatio...

Inner core rotation from event-pair analysis

The last decade has witnessed an animated debate on whether the inner core rotation is a fact or an artifact. Here we examine the temporal change of inner core waves using a technique that compares differential travel times at the same station but between two events. The method does not require precise knowledge of earthquake locations and earth models. The pairing of the events creates a large...