Two Harvard seismologists, Miaki Ishii and Adam Dziewonski, first proposed the idea of the innermost inner core in 2002 based on peculiarities in the speed of seismic waves passing through the ...

ULVZs, which are located in the lower mantle near the core-mantle boundary, can slow seismic waves by up to 50%. That's remarkable, said Michael Thorne , a geologist and geophysicist at the ...

A phase change in post-perovskite materials at the so-called D” discontinuity is also evidence for long-predicted slow, convective flows in the mantle itself ...

Specifically, PKP waves are P-waves that have traveled through the Earth's mantle and core, and arrive at the surface at a variety of speeds depending on how far they traveled through these layers.

Seismic waves accelerate in the D" layer, about 2,700 km deep, due to the alignment of post-perovskite crystals, which occurs as solid mantle rock flows horizontally under extreme pressure and ...

Mantle plumes are important geologic processes—they interact with plate tectonics, create rich mineral deposits, and even ...

About 2,890 kilometres beneath our feet lies a gigantic ball of liquid metal: our planet’s core. Scientists like me use the seismic waves created by earthquakes as a kind of ultrasound to “see ...

ULVZs, which are located in the lower mantle near the core-mantle boundary, can slow seismic waves by up to 50%. That's remarkable, said Michael Thorne , a geologist and geophysicist at the ...

ULVZs, which are located in the lower mantle near the core-mantle boundary, can slow seismic waves by up to 50%. That's remarkable, said Michael Thorne , a geologist and geophysicist at the ...

ULVZs, which are located in the lower mantle near the core-mantle boundary, can slow seismic waves by up to 50%. That's remarkable, said Michael Thorne, a geologist and geophysicist at the ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Mysterious zones in the deep mantle where earthquake waves slow to a crawl may actually be ...