[KCDXC] [VHF] Solar flare eruptions set to reach Earth
Robert Underwood
runderwood6 at kc.rr.com
Thu Feb 17 19:11:54 EST 2011
Big sucko city, bands most likely dead Damn! Watch for Tuesday or
Wednesday tho.
73 Rob
-- K0RU --
FOC#: 1891
FOG#: 006
SKCC#: 329
FISTS#: 7436
CWOPS#: 478
-----Original Message-----
From: Jeff Blaine [mailto:Jeff.Blaine at epak.com]
Sent: Thursday, February 17, 2011 3:52 PM
To: Russ K2TXB; W0WOI at aol.com; tcdxa-list at tcdxa.org; kcdxc at mailman.qth.net;
vhf at w6yx.stanford.edu
Subject: Re: [KCDXC] [VHF] Solar flare eruptions set to reach Earth
Implications for this weekend's ARRL DX contest?
73/jeff/ac0c
-----Original Message-----
From: kcdxc-bounces at mailman.qth.net [mailto:kcdxc-bounces at mailman.qth.net]
On Behalf Of Russ K2TXB
Sent: Thursday, February 17, 2011 3:43 PM
To: W0WOI at aol.com; tcdxa-list at tcdxa.org; kcdxc at mailman.qth.net;
vhf at w6yx.stanford.edu
Subject: Re: [KCDXC] [VHF] Solar flare eruptions set to reach Earth
WOW! That's really incredible! Thanks Bill
73, Russ K2TXB
> -----Original Message-----
> From: owner-vhf at w6yx.stanford.edu
> [mailto:owner-vhf at w6yx.stanford.edu] On Behalf Of W0WOI at aol.com
> Sent: Thursday, February 17, 2011 11:36 AM
> To: tcdxa-list at tcdxa.org; kcdxc at mailman.qth.net; vhf at w6yx.stanford.edu
> Subject: [VHF] Solar flare eruptions set to reach Earth
>
> 17 February 2011 Last updated at 08:07 ET Solar flare eruptions set
> to reach Earth By Paul Rincon Science reporter, BBC News
>
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> Click to play
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> _
> Click to play_
> (http://www.bbc.co.uk/news/science-environment-12493980#play)
>
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> Time lapse image of the solar flare as seen by Nasa's Solar Dynamics
> Observatory
>
>
>
> Related Stories
> * _Aurora Borealis to light up sky_
> (http://www.bbc.co.uk/news/uk-scotland-highlands-islands-12493448)
> * _Sun unleashes huge solar flare_
> (http://www.bbc.co.uk/news/science-environment-12485104)
> * _Satellites sit either side of Sun_
> (http://www.bbc.co.uk/news/science-environment-12365083)
>
> Scientists around the world will be watching closely as
> three eruptions
> from the Sun reach the Earth over Thursday and Friday.
> These "coronal mass ejections" will slam into the Earth's
> magnetic shield.
> The waves of charged solar particles are the result of three
> solar flares
> directed at Earth in recent days, including the most powerful
> since 2006.
> The biggest flares can disrupt technology, including power grids,
> communications systems and satellites.
> The northern lights (Aurora Borealis) may also be visible
> further south
> than is normally the case - including from northern parts of the UK.
> "Our current view is that the effect of the solar flare is
> likely to reach
> Earth later today (Thursday GMT), possibly tomorrow morning,"
> said Alan
> Thomson, head of geomagnetism at the British Geological
> Survey (BGS).
> He told BBC News: "In the scientific community, there's a
> feeling that it's
> not as intense as we first thought it might be. But it's
> possible still
> that it could be a large enough event for us to see the
> northern lights in
> the UK."
> However, weather forecasts suggested cloudy conditions could
> mar views of
> any aurorae.Technological impact
> The US National Oceanographic and Atmospheric Administration
> (Noaa) said
> that three coronal mass ejections (CMEs) were en route as
> the result of solar
> flares on the 13, 14 and 15 February (GMT).
> "The last of the three seems to be the fastest and may catch
> both of the
> forerunners about mid-to-late day tomorrow, February 17,"
> read a statement
> from Noaa's Space Weather Prediction Center.
> The northern lights could be seen further south than is normal
> The flare recorded at 0156 GMT on 15 February was the
> strongest such event
> in four years, according to the US space agency (Nasa),
> which has been
> monitoring activity on the Sun. The event was classified as
> a so-called
> X-flare, the most intense type.
> The source of all three events, sunspot 1158, has expanded rapidly in
> recent days.
> Solar flares are caused by the sudden release of magnetic
> energy stored in
> the Sun's atmosphere.
> Their effects can interfere with modern technology on Earth, such as
> electrical power grids, communications systems and satellites
> - including
> satellite navigation (or sat-nav) signals.
> Although scientists are expecting most geomagnetic activity
> to occur on
> Thursday, Chinese state media has already reported some disruption to
> shortwave radio communications in the south of the country.
> Awakening Sun
> In 1972, a geomagnetic storm provoked by a solar flare knocked out
> long-distance telephone communication across the US state of
> Illinois. And in
> 1989, another storm plunged six million people into darkness
> across the Canadian
> province of Quebec.
> Dr Thomson said it was possible infrastructure could be
> affected this time,
> but stressed: "The X-flare that was observed the other day
> was lower in
> magnitude than similar flares that have been associated with
> technological
> damage such as the loss of the Quebec power grid... and even
> the large
> magnetic storm in 2003, which caused some damage to
> satellites in orbit."
> Scientists will have around half an hour's notice that the
> wave of charged
> particles is about to hit the Earth's magnetic shield.
> This is taken from the point at which a Nasa satellite called
> Ace (the
> Advanced Composition Explorer) registers the solar radiation on its
> instruments: "We're sitting waiting for that event to
> happen," said Dr Thomson.
> Researchers say the Sun has been awakening after a period of
> several years
> of low activity.
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--
Its not how many watts you have,
its the SIZE of your watts that matter! -- Johnny Marshall, W0JM-SK
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--
Its not how many watts you have,
its the SIZE of your watts that matter! -- Johnny Marshall, W0JM-SK
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