AFRICA - Enormous blob deep beneath Africa is slowly rising, researchers from Arizona State University discover

Title:

Enormous blob deep beneath Africa is slowly rising, scientists discover

 

Author:

Hannah Osborne

 

Published:

Newsweek, 14 March 2022

https://www.newsweek.com/giant-blob-africa-earth-core-mantle-anomoly-rising-1687664

 

From the article:

"Deep beneath Earth's surface, on opposite sides of the planet, sit two enormous blob-like structures spanning thousands of miles. And one of them, beneath Africa, is slowly creeping up towards the surface."  

 

ALSO SEE

 

Yuan, Q., Li, M. Instability of the African large low-shear-wave-velocity province due to its low intrinsic density. Nat. Geosci. (2022). https://doi.org/10.1038/s41561-022-00908-3

 

Research led by Australian National University - Earth has a hidden layer, and no one knows exactly what it is - by Stephanie Pappas

Title:

Earth has a hidden layer, and no one knows exactly what it is 

 

Author:

Stephanie Pappas

 

Published:

Live Science, 8 March 2021

https://www.livescience.com/new-earth-layer-solid-inner-core.html

 

From the article:

Earth might have more layers than scientists thought.  

 

New research finds that there may be a hidden layer inside the Earth's solid inner core — an inner-inner core, if you will. The precise nature of this layer is mysterious, but it could have something to do with changes in the structure of iron under extreme temperatures and pressure. The study reveals that there is more complexity to the inner core than previously appreciated, said Jo Stephenson, a doctoral student in seismology at Australian National University in Canberra, who led the research.  

 

"It's not just a solid ball of iron," Stephenson told Live Science.

Implications for megathrust earthquakes and tsunamis from seismic gaps south of Java Indonesia [Scholarly Article - Nature, 17 September 2020]

Title:

Implications for megathrust earthquakes and tsunamis from seismic gaps south of Java Indonesia

 

Authors:

S. Widiyantoro, E. Gunawan, A. Muhari, N. Rawlinson, J. Mori, N. R. Hanifa, S. Susilo, P. Supendi, H. A. Shiddiqi, A. D. Nugraha & H. E. Putra

 

Published:

Nature, 17 September 2020

https://www.nature.com/articles/s41598-020-72142-z

 

Abstract:

Relocation of earthquakes recorded by the agency for meteorology, climatology and geophysics (BMKG) in Indonesia and inversions of global positioning system (GPS) data reveal clear seismic gaps to the south of the island of Java. These gaps may be related to potential sources of future megathrust earthquakes in the region. To assess the expected inundation hazard, tsunami modeling was conducted based on several scenarios involving large tsunamigenic earthquakes generated by ruptures along segments of the megathrust south of Java. The worst-case scenario, in which the two megathrust segments spanning Java rupture simultaneously, shows that tsunami heights can reach ~ 20 m and ~ 12 m on the south coast of West and East Java, respectively, with an average maximum height of 4.5 m along the entire south coast of Java. These results support recent calls for a strengthening of the existing Indonesian Tsunami Early Warning System (InaTEWS), especially in Java, the most densely populated island in Indonesia.