Propagation de K7RA


Propagation de K7RA.

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No trip to your ham shack would be complete without checking the propagation forecast from Tad Cook (K7RA).  Tom and his worldwide network of volunteers deliver an accurate and timely report of solar weather conditions, so you can make the most efficient use of your time behind the mic or key.

For the latest Amateur Radio news and events, please check out the blog sidebar. These news feeds are updated frequently.

You can follow our blog community with a free email subscription or by tapping into the blog RSS feed.

Please excuse the lack of reports this week–my trusty HP Pavilion Slimline PC lost a power supply earlier this week and I’ve been using an older Compaq PC to maintain my various Hawaii news and Amateur Radio blogs.

Thanks for joining us today!

Aloha es 73 de Russ (KH6JRM).

The K7RA Solar Update


The K7RA Solar Update

TAGS: 14 points, ARRL bulletins, ARRL Technical Information, average daily sunspot, cm flux, czech republic, daily solar flux, David Moore, email distribution, geomagnetic field, geomagnetic forecast, Jon Jones, mid-latitude A indices, monthly propagation charts, past propagation bulletins, Petr Kolman, Phil Plait, radio propagation, sea level, solar flux, solar flux peaks, solar wind, sunspot numbers

11/21/2014

Average daily sunspot numbers rose this past week nearly 14 points to 98.9, while average daily solar flux increased 25 points to 164.4.

Predicted solar flux is 170 on November 21, 175 on November 22-23, then 170, 155 and 150 on November 24-26, then 145, 130 and 120 on November 27-29, 115 on November 30 through December 6, 135 and 155 on December 7-8, 165 on December 9-10, and 160 on December 11-15. Solar flux peaks at 170 on December 17-19 and declines to 115 on December 27-31.

Predicted planetary A index is 12 on November 21, 10 on November 22, 12 on November 23-24, 8 on November 25, 5 on November 26 through December 3, 12, 10 and 8 on December 4-6, 5 on December 7-10, and 10, 15, 20, 15, 12, 10, 8, 10 and 12 on December 11-19.

Petr Kolman, OK1MGW, sends a geomagnetic forecast this week from the Czech Republic. He predicts the geomagnetic field will be quiet to unsettled November 21-23, mostly quiet November 24, quiet November 25-26, mostly quiet November 27—29, quiet to unsettled November 30, active to disturbed December 1, quiet to active December 2, quiet to unsettled December 3-4, mostly quiet December 5, quiet to active December 6-7, quiet to unsettled December 8, mostly quiet December 9-10, quiet to unsettled December 11, quiet to active December 12-13, quiet to unsettled December 14-15, and quiet to active December 16-17.

Petr expects an increase in solar wind on November 30 through December 2 and December 11-13.

David Moore sent this article with time-lapse video of that huge sunspot:

http://www.huffingtonpost.com/2014/11/11/sunspot-time-lapse-ar-2192_n_6137490.html

Jon Jones, N0JK, reported that on November 10, Mike White, K7ULS, in Utah worked KH6U and KH6/K6MIO on six meters via F2 propagation using a ground mounted Ringo Ranger vertical. But take a look at http://www.qrz.com/db/k7uls. There is a nice photo of that antenna, which is 8,000 feet above sea level! Mike is running 100 watts, and told me both contacts were on SSB.

Yet another article and video about mammoth sunspots is in Phil Plait’s Bad Astronomy blog:

http://www.slate.com/blogs/bad_astronomy/2014/11/16/sdo_and_sunspot_2192_amazing_hi_def_video.html

For more information concerning radio propagation, see the ARRL Technical Information Service at http://arrl.org/propagation-of-rf-signals. For an explanation of the numbers used in this bulletin, see http://arrl.org/the-sun-the-earth-the-ionosphere. An archive of past propagation bulletins is at http://arrl.org/w1aw-bulletins-archive-propagation. More good information and tutorials on propagation are at http://k9la.us/.

Monthly propagation charts between four USA regions and twelve overseas locations are at http://arrl.org/propagation.

Instructions for starting or ending email distribution of ARRL bulletins are at http://arrl.org/bulletins.

Sunspot numbers for November 13 through 19 were 104, 117, 100, 91, 95, 92, and 72, with a mean of 98.9. 10.7 cm flux was 153.5, 161, 160.6, 171.5, 167.5, 167.4, and 169.6, with a mean of 164.4. Estimated planetary A indices were 5, 12, 17, 22, 12, 11, and 8, with a mean of 12.4. Estimated mid-latitude A indices were 4, 9, 13, 18, 8, 9, and 6, with a mean of 9.6.

 

via The K7RA Solar Update.

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Tad Cook (K7RA) and his group of volunteer spotters  have compiled another complete HF propagation report.  Tad provides sunspot numbers, expected propagation to various parts of the Earth, and several helpful propagation links to help you determine the best place to aim your antenna.

For the latest Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

Propagation Report from Hannes Coetzee, ZS6BZP


Page last updated on: Saturday, November 15, 2014 Share on facebookShare on twitterShare on emailShare on printMore Sharing Services3. Hannes Coetzee, ZS6BZPPropagation Report from Hannes Coetzee, ZS6BZP16 November, 2014. Hannes Coetzee, ZS6BZP, reports that the solar activity will be at low to moderate levels.Decaying sunspot 2205 may still produce M- or X-class solar flares. If you want to do your own frequency predictions, the expected effective sunspot number for the week will be around 130. The 20 to 10 m bands will provide lots of DX fun with some exciting 10 m openings at hand.Please visit the website http://spaceweather.sansa.org.za for further informationSouth African Radio League• All propagation reports can be found at:http://www.southgatearc.org/propagation

via Propagation Report from Hannes Coetzee, ZS6BZP.

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Here’s the latest HF propagation report from Hannes Coetzee (ZS6BZP).  Hannes says solar activity will be low to moderate, with some solar flares expected from dying sunspot 2205. Twenty through ten meters should be good for some daytime DX contacts.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

Old Sunspot Returns


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Page last updated on: Thursday, November 13, 2014

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Old Sunspot Returns

Space Weather reports late last month, the biggest sunspot in nearly 25 years crossed the face of the sun, blasting Earth’s upper atmosphere with dozens of solar flares. Its name was AR2192, and now it’s back

The old sunspot is emerging over the sun’s southeastern limb following two weeks on the farside of the sun. See the website for a movie from the Solar and Heliospheric Observatory.

In late October, AR2192 unleashed 6 X-class solar flares and many more M-class flares. Strong HF radio blackouts were a daily occurance, and millions of people glimpsed the sunspot during a partial solar eclipse.

For the past two weeks, the behemoth sunspot has been transiting the farside of the sun. During that time it probably decayed. Even if it retains only a fraction of its former vigor, however, it could still bring a significant uptick in solar activity when it fully emerges in the days ahead.

Space Weather

http://spaceweather.com/

via Old Sunspot Returns.

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Excellent article from the Southgate Amateur Radio Club.  It seems as if the huge sunspot known as AR2192 is turning its face again towards Earth.  This large area of the sun’s surface generated several M-class and X-class solar flares the last time it faced our planet.  Let’s hope that a major CME doesn’t occur.  A CME could cause disruption in HF radio propagation and interfere with satellites and solid state equipment.

For the latest in Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

Propagation Report from Hannes Coetzee, ZS6BZP | Southgate Amateur Radio News


Page last updated on: Saturday, October 25, 2014

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Hannes Coetzee, ZS6BZP

Propagation Report from

Hannes Coetzee, ZS6BZP

26 October, 2014

Hannes Coetzee, ZS6BZP, reports that the expected solar activity will be at moderate

levels with huge sunspot AR2192 posing a

threat for X-class solar flares.

If you want to do your own frequency predictions, the expected effective sunspot number for the week will be around 160.

The 20 to 10 metre bands will provide lots of DX fun with some exciting 6 metre openings also possible.

Please visit the website http://spaceweather.sansa.org.za for further information

South African Radio League

• All propagation reports can be found at:

http://www.southgatearc.org/propagation

 

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via Propagation Report from Hannes Coetzee, ZS6BZP | Southgate Amateur Radio News.

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Here’s the latest propagation forecast from Hannes Coetzee (ZD6BZP). Large sunspot AR2192 could make the week exciting with the possibility of a X-class solar flare.  This huge sunspot has already generated at least seven M-class solar flares, which have briefly interrupted HF communications.  Hannes believes “The 20 to 10 metre bands will provide lots of DX fun with some exciting 5 metre openings also possible.:

For the latest Amateur Radio News and Events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

Another X-flare | Southgate Amateur Radio News


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Page last updated on: Saturday, October 25, 2014

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Another X-flare

Space Weather reports a giant sunspot AR2192 erupted again on Oct. 24 at 21:40 UT, producing a powerful X3-class solar flare

Using a backyard solar telescope, Sergio Castillo of Corona, California, was monitoring the sunspot when it exploded, his picture can be seen on the Space Weather page.

“This flare was so intense that it almost shorted out my computer!

Well … not really,” says Castillo, “but I knew right away that it was an

X-class eruption.”

A pulse of extreme UV radiation from the flare ionized the upper layers of Earth’s atmosphere, causing a brief but strong blackout of HF radio communications over the dayside of Earth. Such blackouts may be noticed by amateur radio operators, aviators, and mariners.

Coronagraph data from the Solar and Heliospheric Observatory (SOHO) suggest that the explosion did not hurl a significant CME toward our planet. (Interestinngly, none of the X-flares from this active region has so far produced a major CME.) As a result, Earth-effects may be limited to the radio blackout.

Space Weather

http://spaceweather.com/

via Another X-flare | Southgate Amateur Radio News.

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It seems large sunspot AR2192 is producing both X-class and M-class solar flares.  These flares have caused temporary blackouts of HF radio communications.  Coronograph data from the SOHO satellite “suggest that the explosion did not hurl a significant CME toward our planet.”  We escaped the proverbial “bullet” again.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ  (KH6JRM).

Lots of solar flares | Southgate Amateur Radio News


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Page last updated on: Thursday, October 23, 2014

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Lots of solar flares

Space Weather report solar activity is high. In just 48 hours, monster sunspot AR2192 has produced a series of seven M-class solar flares of increasing intensity

The eruptions crossed the threshold into X-territory with an X1-class flare on Oct. 22nd. NASA’s Solar Dynamics Observatory recorded a powerful flash of extreme UV radiation in the sunspot’s magnetic canopy at 14:30 UT.

Remarkably, not one of the explosions so far has hurled a significant CME toward Earth. The primary effect of the flares has been to ionize Earth’s upper atmosphere, causing a series of short-lived HF radio communications blackouts. Such blackouts may be noticed by amateur radio operators, aviators, and mariners.

Earth-effects could increase in the days ahead. AR2192 has an unstable ‘beta-gamma-delta’ magnetic field that harbors energy for powerful explosions, and the active region is turning toward Earth. NOAA forecasters estimate at 65% chance of M-class flares and a 20% chance of X-flares during the next 24 hours.

Space Weather

http://spaceweather.com/

 

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via Lots of solar flares | Southgate Amateur Radio News.

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This could be an interesting propagation week for both amateur radio operators and commercial broadcasters.  According to Space Weather, sunspot AR2192 has produced at least 7 M-class solar flares.  More flares may be on the way.  So far, the only effect has been a temporary interruption of HF communications lasting only a few hours.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

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