CANNER
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Join date : 2013-04-30
 |  Subject: Earth's magnetic shield booms like a drum when hit by impulses  Tue Feb 12, 2019 12:39 pm | |
| Finally, Linda Moulton Howe's 'mystery booms' scientifically explained.  Not really a surprise for me, I always suspected this, since I already noticed these booms often occur during or right after earthfacing solar activity.  [You must be registered and logged in to see this image.]Earth's magnetic shield booms like a drum when hit by impulses - phys.org wrote:
- The Earth's magnetic shield booms like a drum when it is hit by strong impulses, according to new research from Queen Mary University of London.
As an impulse strikes the outer boundary of the shield, known as the magnetopause, ripples travel along its surface which then get reflected back when they approach the magnetic poles.
The interference of the original and reflected waves leads to a standing wave pattern, in which specific points appear to be standing still while others vibrate back and forth. A drum resonates like this when struck in exactly the same way.
This study, published in Nature Communications, describes the first time this effect has been observed after it was theoretically proposed 45 years ago.
Movements of the magnetopause are important in controlling the flow of energy within our space environment with wide-ranging effects on space weather, which is how phenomena from space can potentially damage technology like power grids, GPS and even passenger airlines.
The discovery that the boundary moves in this way sheds light on potential global consequences that previously had not been considered.
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