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A magnificent eruption!
On September 29th (2013/09/29), a long filament of plasma captured by
the magnetism in the Sun's northern hemisphere erupted. This produced
a stunningly beautiful coronal mass ejection (CME). Although the CME
was not aimed at Earth, the CME passed by the Earth with a glancing
blow from the plasma cloud on October 2-3 2013. This caused a
geomagnetic storm (minor level), which lowered the Maximum Usable
Frequency (MUF) over many ionospheric radio-wave propagation paths on
shortwave radio. This is often regarded as a degradation of shortwave
radio conditions. Some aurora is also produced, though this event did
not cause much significant aurora.
http://g.nw7us.us/19hP1c3
Credit: SOHO/Stereo/SDO/NASA
--
Tomas David Hood (Amateur Radio, NW7US)
http://NW7US.us/
Contributing editor, Propagation Column:
CQ Magazine, CQ VHF, Popular Communications
Space Weather: http://sunspotwatch.com/
Twitter NW7US : @NW7US ( http://Twitter.com/NW7US )
Linux User #32405 - Since 1996
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