SECTIONS

 — Sponsored by Ghost Hunter Apps

 

Earth's magnetic north pole is moving too fast for experts to keep up.

A. Leaf (strangeradiocentral.com), 05/28/2019

Now scientists might know why.  

Earth's magnetic north pole keeps moving. In the past few years, it has moved so much that the National Oceanic and Atmospheric Administration issued an early update to its World Magnetic Model, which informs everything from GPS apps to the US Department of Defense's navigation systems. Scientists aren't certain why the planet's magnetic field, which protects us from deadly solar winds, keeps shifting, but one theory is that geomagnetic pulses in the planet's core throw the field into whack. In a new study, researchers modeled the source and timing of those sudden geomagnetic jerks.

In the Hollywood blockbuster "The Core," the planet's core suddenly stops rotating, causing Earth's magnetic field to collapse. Then bursts of deadly microwaves cook the Colosseum and melt the Golden Gate Bridge. While "nearly everything in the movie is wrong," according to Justin Revenaugh, a seismologist from the University of Minnesota, it is true that Earth's magnetic field shields the planet from deadly and destructive solar radiation. Without it, solar winds could strip Earth of its oceans and atmosphere. But the planet's magnetic field isn't static. The Earth's north magnetic pole (which is not the same as geographic north) has led scientists on something of a goose chase over the past century. Each year, it moves north by an average of about 30 miles. That movement made the World Magnetic Model — which tracks the field and informs compasses, smartphone GPS, and navigation systems on planes and ships — inaccurate. Since the next planned update of the WMM wasn't until 2020, the US military requested an unprecedented early update to account for magnetic north's accelerated gambol. Now authors of a new study have gained insight into why magnetic north might be moving — and are learning how to predict these shifts.

Tracking movement in the Earth's core

Earth's magnetic field exists thanks to swirling liquid nickel and iron in the planet's outer core some 1,800 miles beneath the surface. Anchored by the north and south magnetic poles (which tend to shift around and even reverse every million years or so), the field waxes and wanes in strength, undulating based on what's going on in the core. Periodic and sometimes random changes in the distribution of that turbulent liquid metal can cause idiosyncrasies in the magnetic field. If you imagine the magnetic field as a series of rubber bands that thread through the magnetic poles and the Earth's core, then changes in the core essentially tug on different rubber bands in various places. Those geomagnetic tugs influence the north magnetic pole's migration and can even cause it to veer wildly from its position. So far, predicting these magnetic-field shifts has been a challenge. But in the new study, the geophysicists Julien Aubert and Christopher Finlay attempted to simulate the physical conditions of Earth's core by having supercomputers crunch 4 million hours' worth of calculations. The researchers knew that the movement of heat from the planet's interior outward could influence the magnetic field. In general, this happens at 6 miles per year. But they found that sometimes there are pockets of liquid iron in the core that happen to be much warmer and lighter than the surrounding fluid. If the difference between these hot, less dense bits of fluid and their colder, denser counterparts is great enough, the warm liquid can rise very quickly. That rapid motion then triggers magnetic waves that careen toward the core's surface, causing geomagnetic jerks.

"Think about these waves like vibrating strings of a musical instrument," Aubert told Business Insider.

Could the magnetic field ever collapse?

Earth's magnetic field shields its atmosphere, which does "a bulk of the work" of keeping out solar radiation, as Revenaugh put it. If we lost our magnetic field, we'd eventually lose our atmosphere. But according to Revenaugh, that's extremely unlikely to happen, since the Earth's core would never stop rotating. Even if the field did collapse, the devastating effects depicted in "The Core" — people with pacemakers dropping dead, out-of-control lightning storms, eviscerated national landmarks — wouldn't follow. A far more likely scenario, Revenaugh suggested, would involve the magnetic poles reversing as they did 780,000 years ago. When such reversals happen ( there have been several in Earth's history), the magnetic field drops to about 30% of its full strength, he said. Though that's a far-away scenario, Revenaugh added that it's still important to improve scientists' understanding of the magnetic field today.

"The better we can model it, the better we can understand what's it's up to," he said.

Earth's magnetic north pole is moving too fast for experts to keep up.

 
HEADLINES
IN THE NEWS

Story of Jesus Christ was a HOAX designed to control the people, Biblical scholar claims
The 'peaceful' Messiah story was invented, a scholar has sensationally claimed...
— S. Rogan (strangeradiocentral.com)

NASA Eyes Wild Space Tech Ideas to Mine the Moon and Asteroids
Two far-off NASA concepts could quickly survey lunar craters for astronauts and help identify mining...
— A. Leaf (strangeradiocentral.com)

The mystery of the 100 ton ‘boxes’ at the Serapeum of Saqqara
Ancient precision at its best...
— Finn Sawyer (strangeradiocentral.com)

Yellowstone volcano: Why are THOUSANDS of animals leaving the active supervolcano?
THOUSANDS of Yellowstone animals are migrating away from the active supervolcano, scientists announc...
— Finn Sawyer (strangeradiocentral.com)

Noah's Ark Christian Theme Park is suing its insurance company for Rain Damage.
Heavy rains begin to fall, inundating the earth around it. So they sued....
— S. Rogan (strangeradiocentral.com)

Security camera captures bizarre scene in Colorado Springs
No one seems to know "what the heck" was wandering around her neighborhood......
— A. Leaf (strangeradiocentral.com)

MORE NEWS

The ‘sex slave’ scandal that exposed pedophile billionaire Jeffrey Epstein -TRUMP, CLINTON, PRINCE ANDREW
“I’ve known Jeff for 15 years,” Donald Trump said. “Terrific guy. He’s a lot of fun to be with."...
— S. Rogan (strangeradiocentral.com)

Trump - The God Doctrine
How evangelical Christians are guiding Trump’s foreign policy....
— A. Leaf (strangeradiocentral.com)

Putin jokes about Jews and money during visit to Crimea
Russian president suggests Netanyahu should be invited to unveiling of new synagogue in region...
— Finn Sawyer (strangeradiocentral.com)

Religion in US ‘worth more than Google and Apple combined’
Faith is worth $1.2tn a year - more than combined revenues of 10 biggest tech firms in America...
— S. Rogan (strangeradiocentral.com)

ALL FISH FROM PACIFIC TEST POSITIVE FOR RADIATION FROM FUKUSHIMA
“No cause for concern” … nothing to see here. Do you really believe that?...
— A. Leaf (strangeradiocentral.com)

Exorcists are back and people are getting hurt
The rise of exorcism in Catholic and evangelical churches is like a new Inquisition. But there are w...
— A. Leaf (strangeradiocentral.com)

A Giant Severed Wolf Head From 40,000 Years Ago Has Been Unearthed in Siberia
Preserved since the last Ice Age...
— Finn Sawyer (strangeradiocentral.com)

Bitcoin Threatens To 'Take Power' From The U.S. Federal Reserve
Despite the volatile crypto markets, we’re seeing governments and businesses adopting blockchain tec...
— S. Rogan (strangeradiocentral.com)

Hypersonic Weapons Are Almost Here
And They Will Change War Forever...
— Finn Sawyer (strangeradiocentral.com)

How the Jews Invented God, and Made Him Great
It took a traumatic crisis to make him into the all-powerful creator of the world...
— A. Leaf (strangeradiocentral.com)

'Holy sh*t, what is that?' When Top Gun Pilots Tangled with a Baffling Tic-Tac-Shaped UFO
Fighter pilots and radar operators from the USS Nimitz describe their terrifying—and still inexplica...
— S. Rogan (strangeradiocentral.com)

Senators receive classified briefing on UFO sightings
US senators and the Senate Intelligence committee received a classified briefing about reported enco...
— A. Leaf (strangeradiocentral.com)

PLEASE SUBSCRIBE AND FOLLOW US ON SOCIAL MEDIA
SPREAKER |  TWITTER |  FACEBOOK |  SOUNDCLOUD |  YOUTUBE

STRANGERADIOCENTRAL.com
"Quality Internet Radio and Podcast Production."
© Copyright - AO2 IT CORP. - 2019. All Rights Reserved.
Privacy Policy

 
StrangeRadioCentral.com