BROWNNOSE
BOOTLICKER
Jan 8, 2011
The Earth’s magnetic poles are shifting.
They have shifted so much that a runway at Tampa International Airport has been shut down.
The runway markings and designations need to be changed so the airplanes can approach and land safely.
The magnetic poles do not coincide with the north and south poles on which the earth rotates.
Anyone who uses a compass and a map to plan a hike or find their way around in the forest knows how to use the offset between the magnetic and true north to maintain a true course.
Human Alien of Above Top Secret reports: The poles have shifted. They Closed down a runway at Tampa airport to repaint the 'numeric designators' to line up with new Direction .
cryptogon tells us: Federal Aviation Required a change to account for what a National Geographic News report described as a gradual shift of the Earth’s magnetic pole at nearly 40 miles a year toward Russia because of magnetic changes in the core of the planet.
The Truth Behind The Scenes reveals: The busiest runway will be re-designated 19R/1L on aviation charts. It’s been 18R/36L, indicating its alignment along the 180-degree approach from the north and the 360-degree approach from the south.
The offset between the magnetic and true north varies with the particular location on the earth and is referred to as the magnetic declination.
When you take into consideration that the magnetic pole is moving toward Russia at a rate of 40 miles per year, changes have to be made.
A magnetic shift of three degrees or more at an airport require changes to be made on the runway markings and on aviation maps.
Most maps used for navigation have the magnetic declination indicated on them.
There are also world country and world maps that show the magnetic declination lines.
Continue reading on Examiner.com: Tampa International Airport runway shut down due to magnetic pole shift - Pics - National Blogosphere Buzz | Examiner.com Tampa International Airport runway shut down due to magnetic pole shift - Pics - National Blogosphere Buzz | Examiner.com
Richard A. Lovett in San Francisco
for National Geographic News
December 24, 2009
Earth's north magnetic pole is racing toward Russia at almost 40 miles (64 kilometers) a year due to magnetic changes in the planet's core, new research says.
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.
Now, newly analyzed data suggest that 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, said Arnaud Chulliat, a geophysicist at the Institut de Physique du Globe de Paris in France.
Finding North
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.
Navigators have used magnetic north for centuries to orient themselves when they're far from recognizable landmarks.
Although global positioning systems have largely replaced such traditional techniques, many people still find compasses useful for getting around underwater and underground where GPS satellites can't communicate.
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 at 34 to 37 miles (55 to 60 kilometers) a year.
A rapidly shifting magnetic pole means that magnetic-field maps need to be updated more often to allow compass users to make the crucial adjustment from magnetic north to true North.
Wandering Pole
Geologists think Earth has a magnetic field because the core is made up of a solid iron center surrounded by rapidly spinning liquid metal. This creates a "dynamo" that drives our magnetic field.
Scientists had long suspected that, since the molten core is constantly moving, changes in its magnetism might be affecting the surface location of magnetic north.
Although the new research seems to back up this idea, Chulliat is not ready to say whether magnetic north will eventually cross into Russia...
"It's too difficult to forecast," Chulliat said.
Also, nobody knows when another change in the core might pop up elsewhere, sending magnetic north wandering in a new direction.
Chulliat presented his work this week at a meeting of the American Geophysical Union in San Francisco.
The Earth’s magnetic poles are shifting.
They have shifted so much that a runway at Tampa International Airport has been shut down.
The runway markings and designations need to be changed so the airplanes can approach and land safely.
The magnetic poles do not coincide with the north and south poles on which the earth rotates.
Anyone who uses a compass and a map to plan a hike or find their way around in the forest knows how to use the offset between the magnetic and true north to maintain a true course.
Human Alien of Above Top Secret reports: The poles have shifted. They Closed down a runway at Tampa airport to repaint the 'numeric designators' to line up with new Direction .
cryptogon tells us: Federal Aviation Required a change to account for what a National Geographic News report described as a gradual shift of the Earth’s magnetic pole at nearly 40 miles a year toward Russia because of magnetic changes in the core of the planet.
The Truth Behind The Scenes reveals: The busiest runway will be re-designated 19R/1L on aviation charts. It’s been 18R/36L, indicating its alignment along the 180-degree approach from the north and the 360-degree approach from the south.
The offset between the magnetic and true north varies with the particular location on the earth and is referred to as the magnetic declination.
When you take into consideration that the magnetic pole is moving toward Russia at a rate of 40 miles per year, changes have to be made.
A magnetic shift of three degrees or more at an airport require changes to be made on the runway markings and on aviation maps.
Most maps used for navigation have the magnetic declination indicated on them.
There are also world country and world maps that show the magnetic declination lines.
Continue reading on Examiner.com: Tampa International Airport runway shut down due to magnetic pole shift - Pics - National Blogosphere Buzz | Examiner.com Tampa International Airport runway shut down due to magnetic pole shift - Pics - National Blogosphere Buzz | Examiner.com
Richard A. Lovett in San Francisco
for National Geographic News
December 24, 2009
Earth's north magnetic pole is racing toward Russia at almost 40 miles (64 kilometers) a year due to magnetic changes in the planet's core, new research says.
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.
Now, newly analyzed data suggest that 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, said Arnaud Chulliat, a geophysicist at the Institut de Physique du Globe de Paris in France.
Finding North
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.
Navigators have used magnetic north for centuries to orient themselves when they're far from recognizable landmarks.
Although global positioning systems have largely replaced such traditional techniques, many people still find compasses useful for getting around underwater and underground where GPS satellites can't communicate.
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 at 34 to 37 miles (55 to 60 kilometers) a year.
A rapidly shifting magnetic pole means that magnetic-field maps need to be updated more often to allow compass users to make the crucial adjustment from magnetic north to true North.
Wandering Pole
Geologists think Earth has a magnetic field because the core is made up of a solid iron center surrounded by rapidly spinning liquid metal. This creates a "dynamo" that drives our magnetic field.
Scientists had long suspected that, since the molten core is constantly moving, changes in its magnetism might be affecting the surface location of magnetic north.
Although the new research seems to back up this idea, Chulliat is not ready to say whether magnetic north will eventually cross into Russia...
"It's too difficult to forecast," Chulliat said.
Also, nobody knows when another change in the core might pop up elsewhere, sending magnetic north wandering in a new direction.
Chulliat presented his work this week at a meeting of the American Geophysical Union in San Francisco.