It can’t be accessed for samples or direct measurements of its spin. Instead, researchers have used seismic waves from earthquakes to learn about it. An earthquake sends these waves deep into the Earth and through the inner core, and scientists pick them up with sensors on the ot...
In other words, knowing that rotation speed can itself be changing will help scientists isolate other factors they want to study—without being misled by overly specific data. Before You Go ... Weird Magnetic Waves Found on Earth’s Outer Core Earth Is Running Out of Sand, Which Is Concernin...
Rapid changing flows in the Earth's core, Nature Geoscience, submitted.Olsen N, Mandea M. 2008. Rapidly changing flows in the Earth’s core. Nat Geosci, 1: 390–394Olsen, N., Mandea, M. (2008) Rapidly changing flows in the Earth’s core. Nature Geosci. 1: pp. 390-394...
Journey to the Center of a Neutron Star A neutron star is not a place most would want to visit. This dense remnant of a collapsed star has a magnetic field billions of times stronger than Earth's, enough to shuffle your body's molecules long before you even land. The featurele... C...
Few of us give much thought to Earth's swirling, spinning contents until some sudden movement, an earthquake or a volcanic eruption, jolts us to our senses.
It is currently unknown whether the Earth's inner core is changing speed, as it is difficult to directly observe the inner core due to its depth and inaccessible location. However, some recent studies using seismic data have suggested that the inner core may be rotating slightly faster or slow...
to remove (a cylindrical sample) from the interior, as of the earth or a tree trunk: to core the ocean bottom. to form a cavity in (a molded object) by placing a core, as of sand, in the mold before pouring. adjective of central importance; basic; fundamental: ...
Recent work confirmed that the inner core rotated faster and then slower than the rest of Earth in the last few decades; this work analysed inner-core-traversing (PKIKP) seismic waves recorded by the Eielson (ILAR) and Yellowknife (YKA) arrays in northern North America from 121 repeating ...
The amplitudes of the angular velocity of Mercury's mantle at planetary forcing periods are also amplified by the resonances, but remain much smaller than the current precision of Earth-based radar observations unless the period is very close to a free libration period. The inclusion of mantle-...
The rotation of the earth about its axis generates a daily cycle of light, temperature, moisture and resources that ultimately affect the microclimate and fitness of organisms [1–5]. A general property of Eukaryotes is that they possess an internal, self-sustaining circadian (circa, about;dies...