Rapid Changes In Earth’s Core Discovered

[KNOWTHIS]

Perhaps this is what has been effecting the navigation abilities of birds, dolphins and whales?

www.sciencedaily.com/releases/2008/06/080619102553.htm

Surprisingly Rapid Changes In Earth’s Core Discovered

The movements in the liquid part of the Earth’s core are changing surprisingly quickly, and this affects the Earth’s magnetic field, according to new research from DTU Space.

Ørsted magnetometer measurements form the base for the latest International Geomagnetic Reference Field, the IGRF2000. A graphical representation of the total magnetic field strength at the Earth's surface inferred from the IGRF2000 is shown below. The blueish-black range of colors represents a field strength above the mean field at the surface and the reddish-yellow range a field strength below the mean field. (Credit: Image courtesy of Danish Meteorological Institute)

The Ørsted satellite’s very precise measurements of the Earth’s magnetic field over the past nine years have made it possible for Nils Olsen, Senior Scientist with DTU Space, and several German scientists, to map surprisingly rapid changes in the movements in the Earth’s core. The results have just been published in the scientific journal Nature Geoscience.

“What is so surprising is that rapid, almost sudden, changes take place in the Earth’s magnetic field. This suggests that similar sudden changes take place in the movement of the liquid metal deep inside the Earth which is the reason for the Earth’s magnetic field,” Nils Olsen explains....