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About Aurorae
Aurora are one effect of energetic particles, which can speed out from the sun both in a steady stream called the solar wind and due to giant eruptions known as coronal mass ejections or CMEs.
Source: About Aurorae
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Large Coronal Holes Causing High Speed Charged Particles
Large Coronal Holes Causing High Speed Charged Particles
http://earthchangesmedia.com/large-coronal-holes-causing-high-speed-charged-particles
During the last fortnight, two coronal holes (one on each solar hemisphere) transited the solar disk, as shown in this clip from GOES15/SXI imagery. Passing the disk’s center around 22-23 April, the high speed gusts of energetic particles created active geomagnetic conditions on 25 April a…
During the last…
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Cosmic Rays Zap a Planet's Chances for Life
Mysterious cosmic rays constantly bombard Earth from outer space. Now scientists find these energetic particles could limit where life as we know it might exist on alien planets.
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Scientists explain the formation of unusual ring of radiation in space
Since the discovery of the Van Allen radiation belts in 1958, space scientists have believed these belts encircling the Earth consist of two doughnut-shaped rings of highly charged particles — an inner ring of high-energy electrons and energetic positive ions and an outer ring of high-energy electrons.
In February of this year, a team of scientists reported the surprising discovery of a previously unknown third radiation ring — a narrow one that briefly appeared between the inner and outer rings in September 2012 and persisted for a month.
In new research, UCLA space scientists have successfully modeled and explained the unprecedented behavior of this third ring, showing that the extremely energetic particles that made up this ring, known as ultra-relativistic electrons, are driven by very different physics than typically observed Van Allen radiation belt particles. The region the belts occupy — ranging from about 1,000 to 50,000 kilometers above the Earth's surface — is filled with electrons so energetic they move close to the speed of light.
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As far as the eye could see, it was a dark night at Las Campanas Observatory in the southern Atacama desert of Chile. But near local midnight on April 11, this mosaic of 3 minute long exposures revealed a green, unusually intense, atmospheric airglow stretching over thin clouds.
Unlike aurorae powered by collisions with energetic charged particles and seen at high latitudes, the airglow is due to chemiluminescence, the production of light in a chemical reaction, and found around the globe.
