Thread: IRIS Webinar on Mantle Imaging Using AfricaArray 2/12, 2 PM Eastern

"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