[SMCARA] Solar Flare Causes "Ground Level Event"

[JD Delancy]

Solar Flare Causes "Ground Level Event"
Energetic particles accelerated by an X8-class solar flare on Sept. 10th 
were so potent they penetrated Earth's atmosphere and reached ground level.
*Space Weather News for Sept. 12, 2017*
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*GROUND LEVEL RADIATION EVENT:* Sunday's powerful X8-class solar flare 
from departing sunspot AR2673 accelerated a swarm of protons toward 
Earth, producing a strong solar radiation storm and a "ground level 
event" (GLE). High-energy particles normally held at bay by Earth's 
atmosphere and magnetic field penetrated all the way to the ground on 
Sept. 10th. A leading analyst of GLEs says that radiation dose rates 
onboard commercial jets flying at high latitudes may have briefly 
doubled during the episode. Learn more about GLEs and what caused this 
solar flare to be so effective on today's edition of Spaceweather.com 
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*Above:* The 'snow' in this Sept. 10th image from a coronagraph onboard 
the orbiting Solar and Heliospheric Observatory (SOHO) is caused by a 
blizzard of energetic particles striking the spacecraft's digital 
camera. The solar radiation storm was so strong, some of these particles 
reached the surface of Earth.