A GLOBAL MAGNETIC ANOMALY

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PinkDiamond
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A GLOBAL MAGNETIC ANOMALY

Post by PinkDiamond »

Strange things are happening everywhere. From spaceweather.com, check this out. ;)
A GLOBAL MAGNETIC ANOMALY: Lately, Earth’s magnetic field has been quiet. Very quiet. The sun is in the pits of what may turn out to be the deepest Solar Minimum in a century. Geomagnetic storms just aren’t happening.

"That’s why I was so surprised on June 23rd when my instruments picked up a magnetic anomaly," reports Stuart Green, who operates a research-grade magnetometer in his backyard in Preston UK. "For more than 30 minutes, the local magnetic field oscillated like a sine wave."

Image

Green quickly checked solar wind data from NOAA's DSCOVR satellite. "There was nothing–no uptick in the solar wind speed or other factors that might explain the disturbance," he says.

He wasn't the only one who noticed. In the Lofoten islands of Norway, Rob Stammes detected a similar anomaly on his magnetometer. "It was remarkable,” says Stammes. "Our magnetic field swung back and forth by about 1/3rd of a degree. I also detected ground currents with the same 10 minute period."

What happened? Space physicists call this phenomenon a "pulsation continuous" or "Pc" for short. Imagine blowing across a piece of paper, making it flutter with your breath. Solar wind can have a similar effect on magnetic fields. Pc waves are essentially flutters propagating down the flanks of Earth's magnetosphere excited by the breath of the sun. During more active phases of the solar cycle, these flutters are easily lost in the noise of rambunctious geomagnetic activity. But during the extreme quiet of Solar Minimum, such waves can make themselves "heard" like a pin dropping in an silent room.

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Earth's magnetic field was so quiet on June 23rd, the ripple was heard all around the world. INTERMAGNET's global network of magnetic observatories picked up wave activity at the same time from Hawaii to China to the Arctic Circle. There's even a hint of it in Antarctica (note Scott Base in the plot, above).

Pc waves are classified into 5 types depending on their period. The 10-minute wave on June 23rd falls into category Pc5. Slow Pc5 waves have been linked to a loss of particles from the van Allen radiation belts. Energetic electrons surf these waves down into Earth’s atmosphere, where they dissipate harmlessly.

With Solar Minimum in full swing, there’s never been a better time to study these waves. Keep quiet … and stay tuned for more.

https://spaceweather.com/
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Re: A GLOBAL MAGNETIC ANOMALY

Post by SwordfishMining »

Well something has to reflect the changing space environment we are in in the planet. The other ones are not changing for no reason. Speaking of changing here is a new paper on the speed of Earths magnetic shield going thru the no protection zero point during the flip.

Dr. Davies and his colleague, Professor Catherine Constable from the Scripps Institution of Oceanography, combined computer simulations of the geomagnetic field generation process with a reconstruction of time variations in the field spanning the last 100,000 years

Their results show that changes in the direction of the geomagnetic field reached rates that are up to 10 times larger than the fastest currently reported variations of up to one degree per year.

They demonstrate that these rapid changes are associated with local weakening of the magnetic field.


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