Original paper

Inner core superrotation: recent observations and future challenges

Song, Xiaodong

Global Tectonics and Metallogeny Volume 8 Number 1-4 (2003), p. 107 - 108

17 references

published: Jan 1, 2003

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ArtNo. ESP136000800055, Price: 19.00 €

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Abstract

Five years ago, Song and Richards reported evidence for differential inner core rotation from time-dependent seismic waves through the inner core. A growing body of evidence now supports the faster rotation of the inner core relative to the mantle. A westward rotation can be ruled out. The current estimates of the rotation rate range from 0.15 to 1.1 deg/yr. With a unique opportunity to observe motions at depth within the core, a detectable inner core rotation has direct implications for the dynamics of the earth's deep interior.

Keywords

inner core rotationseismic wavesearthquake