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phillipbbg

2013 and beyond.... Something Is Going On! as it always does

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Magnetic north just changed. Here's what that means.

Maya Wei-Haas               Feb. 4, 2019

"Magnetic north has never sat still. In the last hundred years or so, the direction in which our compasses steadfastly point has lumbered ever northward, driven by Earth's churning liquid outer core some 1,800 miles beneath the surface. Yet in recent years, scientists noticed something unusual: Magnetic north's routine plod has shifted into high gear, sending it galloping across the Northern Hemisphere—and no one can entirely explain why.

The changes have been so large that scientists began working on an emergency update for the World Magnetic Model, the mathematical system that lays the foundations for navigation, from cell phones and ships to commercial airlines. But then the U.S. government shut down, placing the model's official release on hold, as Nature News first reported earlier this year.

Now, the wait for a new north is over. The World Magnetic Model update was officially released on Monday, and magnetic north can again be precisely located for people around the world.

Questions still likely abound: Why is magnetic north changing so fast? What were the impacts of the update's delay? Was there really a geologic reason Google maps sent me off course? We've got you covered.

What is magnetic north?
Magnetic north is one of three “north poles” on our globe. First, there's true north, which is the northern end of the axis on which our planet turns.

But our planet's protective magnetic bubble, or magnetosphere, isn't perfectly aligned with this spin. Instead, the dynamo of Earth's core creates a magnetic field that is slightly tilted from the planet's rotational axis. The northern end of this planet-size bar magnet is what's known as geomagnetic north—a point sitting off the northwest coast of Greenland that's changed position little over the last century.

Then there's magnetic north, what your compass locates, which is defined as the point at which magnetic field lines point vertically down. Unlike geomagnetic north, this position is more susceptible to the surges and flows in the swirl of liquid iron in the core. These currents tug on the magnetic field, sending magnetic north hopping across the globe.

“The north magnetic pole is quite a sensitive place,” says Phil Livermore, a geophysicist at the University of Leeds."

snip

https://www.msn.com/en-us/news/technology/magnetic-north-just-changed-heres-what-that-means/ar-BBTb3iR?ocid=spartandhp

 

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MEGA River forms visible from SPACE - Ground Spontaneous Combusting - Now a Cyclone Off Shore!

 

Stay safe everybody in Australia.

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YES Breezy ,it has been a horrible summer .We had 1400mms [56 inches]of rain  in 11 days where I live.We had just got over the massive bushfires here in the upper Pioneer Valley West of Mackay between Finch Hatton and Eungella ,300,00 Hectares burnt including 3,000 hectares of virgin rainforest.Now a cyclone farting arround of the coast trying to make its mind up where it's going to go.I don't know what else Mother Nature can throw at us but is very very sad to see so much destruction of  vegetation, animals and property.My heart goes out to my friends and family who live in the Townsville  to Burdiken Area[Ayr andHome Hill area,where I was raised].Massive mounts of damage in that area.

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