In September 2023, a global seismic mystery began to unfold. Every 90 seconds, the Earth pulsed with a strange, low-frequency ...

Only when all the crystals of the mineral point in the same direction in the model are the seismic waves accelerated—as can be observed in the D" layer at a depth of 2,700 kilometers.

Over a thousand miles from the surface, in Earth’s D” layer—right on the edge of the liquid metal outer core—there is a weird ...

The best measurements would be seismic waves traveling from an earthquake’s origin straight down into the Earth and through the innermost inner core.

Earth's inner core may have paused and reversed its spin, a new study suggests. Earthquakes and nuclear blasts can send seismic waves through the mysterious solid-iron core. Those waves hint that ...

Anisotropy is used to describe how seismic waves speed up or slow down through the material of the Earth’s inner core depending on the direction in which they travel.

They compared seismic readings from the early ‘90s with more recent readings and found that the temporal changes between repeated waves had changed.

By contrast, observations of seismic anisotropy, the directional dependence of seismic wave speed, provide us with tantalizingly direct information about mantle flow direction: crystals of olivine ...

They have demonstrated why earthquake waves change abruptly at a depth of 2,700 kilometres at the so-called D‘’ layer. The reason for this is a type of solid rock that nevertheless flows. This mineral ...

Data captured from seismic waves caused by earthquakes has shed new light on the deepest parts of Earth's inner core, according to seismologists.

Only when all the crystals of the mineral point in the same direction in the model are the seismic waves accelerated—as can be observed in the D" layer at a depth of 2,700 kilometers.