Magnetic North Pole Rapidly Moving Because of Some Blobs!!?
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Published 4 years ago
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he north magnetic pole is lurching away from its traditional home in the Canadian Arctic and toward Siberia because of a fierce tug-of-war battle being waged by two giant blobs hiding deep underground, at the core–mantle boundary, a new study finds.
These blobs, areas of negative magnetic flow under Canada and Siberia, are in a winners-take-all struggle. Already, as these blobs change shape and magnetic intensity, a victor has emerged; from 1999 to 2019, while the blob beneath Canada weakened, the blob under Siberia slightly intensified, the researchers found. "Together, these changes caused the north magnetic pole to travel towards Siberia," the researchers wrote in the study.
When scientists first located the north magnetic pole (the point where your compass needle points) in 1831, it sat in the northern Canadian territory of Nunavut. Soon, researchers realized that the north magnetic pole tended to wander, but it usually didn't stray far. Then, from 1990 to 2005, the magnetic pole's yearly jaunt jumped from a historic speed of no more than 9 miles (15 kilometers) a year to as much as 37 miles (60 km) a year, the researchers wrote in the study.
In October 2017, the north magnetic pole crossed the international date line and entered the Eastern Hemisphere, passing within 242 miles (390 km) of the geographic north pole. Then, the north magnetic pole began moving southward. The change was so rapid, that in 2019, geologists were forced to publish a new World Magnetic Model, a map that informs everything from airplane navigation to the GPS on smartphones, a year ahead of time.
Reconstructions of past north magnetic pole movements suggests that two blobs — and sometimes three — have influenced the pole's position over time. These blobs have prompted the pole to wander around northern Canada for the past 400 years, the researchers said.
"But over the last 7,000 years, [the north magnetic pole] seems to have chaotically moved around the geographic pole, showing no preferred location," the researchers wrote in the study. The pole also moved toward Siberia in 1300 B.C., according to modeling.
These blobs, areas of negative magnetic flow under Canada and Siberia, are in a winners-take-all struggle. Already, as these blobs change shape and magnetic intensity, a victor has emerged; from 1999 to 2019, while the blob beneath Canada weakened, the blob under Siberia slightly intensified, the researchers found. "Together, these changes caused the north magnetic pole to travel towards Siberia," the researchers wrote in the study.
When scientists first located the north magnetic pole (the point where your compass needle points) in 1831, it sat in the northern Canadian territory of Nunavut. Soon, researchers realized that the north magnetic pole tended to wander, but it usually didn't stray far. Then, from 1990 to 2005, the magnetic pole's yearly jaunt jumped from a historic speed of no more than 9 miles (15 kilometers) a year to as much as 37 miles (60 km) a year, the researchers wrote in the study.
In October 2017, the north magnetic pole crossed the international date line and entered the Eastern Hemisphere, passing within 242 miles (390 km) of the geographic north pole. Then, the north magnetic pole began moving southward. The change was so rapid, that in 2019, geologists were forced to publish a new World Magnetic Model, a map that informs everything from airplane navigation to the GPS on smartphones, a year ahead of time.
Reconstructions of past north magnetic pole movements suggests that two blobs — and sometimes three — have influenced the pole's position over time. These blobs have prompted the pole to wander around northern Canada for the past 400 years, the researchers said.
"But over the last 7,000 years, [the north magnetic pole] seems to have chaotically moved around the geographic pole, showing no preferred location," the researchers wrote in the study. The pole also moved toward Siberia in 1300 B.C., according to modeling.
Keywords
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