|Thursday - February 20, 2014
Good Morning All,
Here is today's Severe Weather
Outlook from the National Weather Service:
...THERE IS A SLGT RISK OF SVR
TSTMS OH/MID AND LOWER MS VALLEYS INTO THE TN
VALLEY AND DEEP SOUTH...
News and Comments....
Sun Storm: Blast 20 Times Taller
Than Earth Erupts From Sun
Published February 19, 2014
It's freezing in North America
-- but things are heating up on the sun.
A huge magnetic filament shot
out of the sun Monday, sending shockwaves
racing at 1.7 million miles
per hour and a brief roar of static through
shortwave radios across the
planet. And with a geomagnetic storm causing
Northern Lights to dance across
the Canadian border and into North America,
the sun is clearly acting up.
According to a report on Spaceweather.com,
Monday's massive blast shot off
the sun and into space, away
from our planet, so it didn't have the same
effect on radio signals, power
grids and communication satellites that an
Earth-facing eruption would
But it did cause a Type II radio
burst, the site noted.
"The explosion sent shock waves
rippling through the sun's atmosphere," the
site noted. "Those shock waves,
in turn, triggered plasma instabilities in
the solar corona that emit strong
radio emissions. The static-y 'roar' of
the explosion was picked up
by solar observatories and ham radio stations
across the dayside of our planet."
A "filament" is a feature of
a magnetic loop on the sun: relatively cool,
dense gas suspended above the
sun's surface. Tony Philips, the scientist
behind the Spaceweather.com
site, told FoxNews.com the blast was at least 20
times taller than the Earth.
The force from the blast rocketed from the sun
at around 1.7 million mph --
typical for this type of eruption.
Late Tuesday night, NASA issued
a warning about a geomagnetic storm, which
coupled with a second solar
eruption caused auroras here on Earth, and
trouble for spacecraft and satellites.
"Magnetic fields in the interplanetary
medium have tipped south, opening a
crack in Earth's defenses against
the solar wind. High-latitude sky-watchers
should be alert for auroras,"
Spaceweather.com noted late Wednesday.
Sure enough, auroras were seen
across the Northern Hemisphere.
"The auroras were so bright,
I could actually see a snowy owl on power pole
back lit by the green glow,"
Douglas Kiesling wrote from Sauk Rapids, Minn.
"The owl itself was illuminated
by bright moonlight."
It is often easier to fight for
principles than to live up to them."-- Adlai
Stevenson II, American politician
That's it for today, remember
tomorrow starts the weekend, and be careful
Copyright 2014 by Roger M. Tener, with individual rights
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