[unav_all] IRIS Webinar on Mantle Imaging Using AfricaArray 2/12, 2 PM Eastern

Andy Frassetto andyf at iris.edu
Thu Feb 6 11:26:49 MST 2014


"Imaging the African Superplume Using AfricaArray Data: Is the 
Superplume a Whole-Mantle Structure?" will be presented at 2 pm EST (7 
pm UTC) on Wednesday, 2/12.

Register to attend: https://www2.gotomeeting.com/register/617775338

You will be emailed a confirmation containing a link for accessing the 
webinar. The presentation and subsequent interactions between the 
speaker, host, and audience are recorded and made available within a few 
days. Access to the webinar archive, along with related materials and 
more information on the series is found here: 
http://www.iris.edu/hq/webinar/

Presenter: Professor Andy Nyblade, Pennsylvania State University

Abstract: The African superplume is arguably one of the largest features 
in Earth’s lower mantle and whether or not it extends into the upper 
mantle beneath eastern Africa, giving rise to the Cenozoic rifting, 
volcanism and plateau uplift found there, has long been debated. New 
seismic images of mantle structure obtained from modeling AfricaArray 
data indicate that the superplume is indeed a whole-mantle structure. 
The images come from body and surface wave tomography, receiver function 
stacks illuminating topography on the 410 and 660 km discontinuities, 
and shear wave splitting. The seismic images are consistent with a 
thermal anomaly of a few hundred degrees spanning the mid-mantle 
connecting anomalous lower mantle structure under southern Africa with 
anomalous upper mantle structure under eastern Africa.

Please direct any related inquiries or amusing memes to Andy Frassetto 
(andyf at iris.edu).

System Requirements
PC-based attendees: Windows® 8, 7, Vista, XP or 2003 Server
Mac®-based attendees: Mac OS® X 10.6 or newer
Mobile attendees: iPhone®, iPad®, Android™ phone or Android tablet


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