Sunday, September 26, 2010

North magnetic pole leaving Canada

North Magnetic Pole Moving Due to Core Flux
National Geographic: Earth's north magnetic pole is racing toward Russia at 55 to 60 kilometres (34 to 37 miles) a year due to magnetic changes in the planet's core... The core is too deep for scientists to directly detect its magnetic field. But researchers can infer the field's movements by tracking how Earth's magnetic field has been changing at the surface and in space...

There's a region of rapidly changing magnetism on the core's surface, possibly being created by a mysterious 'plume' of magnetism arising from deeper in the core. And it's this region that could be pulling the magnetic pole away from its long-time location in northern Canada...

Magnetic north, which is the place where compass needles actually point, is near but not exactly in the same place as the geographic North Pole. Right now, magnetic north is close to Canada's Ellesmere Island...

The magnetic north pole had moved little from the time scientists first located it in 1831. Then in 1904, the pole began shifting northeastward at a steady pace of about 9 miles (15 kilometers) a year. In 1989 it sped up again, and in 2007 scientists confirmed that the pole is now galloping toward Siberia.
Image source here.