COSEE Ocean Systems: News
Equatorial anisotropy in the inner part of Earth's inner core from autocorrelation of earthquake coda
Description: Previous anisotropy models of the Earth's inner core have assumed a cylindrical anisotropy in which the symmetry axis is parallel to the Earth's spin axis. An inner part of the inner core with a distinct form of anisotropy has been suggested, but there is considerable uncertainty regarding its existence and characteristics16. Here scientists analyse the autocorrelation of earthquake coda measured by global broadband seismic arrays between 1992 and 2012, and find that the differential travel times of two types of core-penetrating waves vary at low latitudes by up to 10 s. [Source: Nature Geoscience]
URL: http://dx.doi.org/10.1038/ngeo2354
Availability: Summary
Source: Nature Geoscience
Publish Date: 2/9/2015
Reading Level: Expert
Page Length:  

<< BACK