Solar Flares

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Solar Flares
Topic Started: 7 Jul 2012 - 01:02 (527 Views)
Johnno	7 Jul 2012 - 01:02 Post #1
Posts: 882 Group: Global Moderators Member #1,493 Joined: 17-Jul 2011 MANDATORY_Country Australia MANDATORY_Location New South Wales MANDATORY_FirstName John	I was listening for skip this morning and there was some huge static (S-9+) which sounded like breaking waves at the beach. I thought it may have been local interference, but I heard a guy in Queensland talking about it also, must have been this --> http://rbr.com/solar-flare-triggers-radio-blackout/



BigTone	7 Jul 2012 - 01:12 Post #2
26 Charlie Tango 4498 Posts: 464 Group: MemberA Member #1,384 Joined: 23-Jun 2011 MANDATORY_Country England MANDATORY_Location Lincoln MANDATORY_FirstName Tony	Odds on Johnno, On spaceweather.com, Sunspot 1515 has been blasting "M" class flares in fairly rapid succession. I wonder, what you heard, did it sound anything like this http://spaceweather.com/images2012/04jul12/ashcraft.mp3 Sudden Ionospheric Disturbances which (amongst other things) shut down the lower HF bands (eg 3.5 MHz) and aurorae are in the offing.



Johnno	7 Jul 2012 - 02:23 Post #3
Posts: 882 Group: Global Moderators Member #1,493 Joined: 17-Jul 2011 MANDATORY_Country Australia MANDATORY_Location New South Wales MANDATORY_FirstName John	BigTone 7 Jul 2012 - 01:12 I wonder, what you heard, did it sound anything like this http://spaceweather.com/images2012/04jul12/ashcraft.mp3 Hi Tony, it sounded just like that except it was more like waves coming in and crashing, in long pulses, one after the other and on every frequency (didn't think to check other bands, 40, 80 etc ). Weird to think you are listening to the sun!



BigTone	8 Jul 2012 - 19:12 Post #4
26 Charlie Tango 4498 Posts: 464 Group: MemberA Member #1,384 Joined: 23-Jun 2011 MANDATORY_Country England MANDATORY_Location Lincoln MANDATORY_FirstName Tony	M6 flare on now, http://www.swpc.noaa.gov/rt_plots/xray_5m.html Stand by for SIDs Solar noise and aurorae



High Voltage	8 Jul 2012 - 21:32 Post #5
108 Charlie Tango 054 Posts: 479 Group: MemberF Member #1,941 Joined: 29-Oct 2011 MANDATORY_Country Scotland MANDATORY_Location Orkney MANDATORY_FirstName Paul	It's certainly had a massive effect on the propagation, never seen it so quiet for a long time.



BigTone	13 Jul 2012 - 11:20 Post #6
26 Charlie Tango 4498 Posts: 464 Group: MemberA Member #1,384 Joined: 23-Jun 2011 MANDATORY_Country England MANDATORY_Location Lincoln MANDATORY_FirstName Tony	Yesterday an X class flare happened According to spaceweather.com Quote: X-FLARE! Big sunspot AR1520 unleashed an X1.4-class solar flare on July 12th. Because the sunspot is directly facing Earth, everything about the blast was geoeffective. For one thing, it hurled a coronal mass ejection (CME) directly toward our planet. According to a forecast track prepared by analysts at the Goddard Space Weather Lab, the CME will hit Earth on July 14th around 10:20 UT (+/- 7 hours) and could spark strong geomagnetic storms. Sky watchers should be alert for auroras this weekend. Geomagnetic storm alerts: text, voice. The explosion also strobed Earth with a pulse of extreme UV radiation, shown here in a movie recorded by NASA's Solar Dynamics Observatory: The UV pulse partially ionized Earth's upper atmosphere, disturbing the normal propagation of radio signals around the planet. Monitoring stations in Norway, Ireland and Italy recorded the sudden ionospheric disturbance. Finally, solar protons accelerated by the blast are swarming around Earth. The radiation storm, in progress, ranks "S1" on NOAA space weather scales, which means it poses no serious threat to satellites or astronauts. This could change if the storm continues to intensify. Stay tuned



29AMK32	13 Jul 2012 - 20:18 Post #7
29 Charlie Tango 032 Posts: 186 Group: MemberF Member #1,515 Joined: 23-Jul 2011 MANDATORY_Country Republic of Ireland MANDATORY_Location donegal MANDATORY_FirstName Alan	Johnno 7 Jul 2012 - 01:02 I was listening for skip this morning and there was some huge static (S-9+) which sounded like breaking waves at the beach. I thought it may have been local interference, but I heard a guy in Queensland talking about it also, must have been this --> http://rbr.com/solar-flare-triggers-radio-blackout/ Ok what activity from the sun helps creat good skip on the radio bands??? For exsample 2 or 3 hours of good strong singles between 26DIV and 29DIV.. Iam not on about the 11yr cycle.. Iam trying to understand the whole geomagnetic solar storms, solar flares,M-class.X-class and so on.. So far i worked out geomagnetic solar storms are not good and can cause black outs on the different bands on the radio.. Any ideas people



BigTone	13 Jul 2012 - 22:47 Post #8
26 Charlie Tango 4498 Posts: 464 Group: MemberA Member #1,384 Joined: 23-Jun 2011 MANDATORY_Country England MANDATORY_Location Lincoln MANDATORY_FirstName Tony	A bit confusing at the moment. I would think that might have been Sporadic E which is not tied into solar activity (We are at the peak of the Es season) But the Sun is active so I dont know with any certainty. To properly answer your question will be a bit long winded. Solar flares are rated on X Ray output. As the saying goes, a picture is worth a thousand words http://www.swpc.noaa.gov/rt_plots/xray_5m.html The sunspots are areas of magnetic disturbance giving cooler spots. When the magnetic fields are twisted up things snap and plasma is released (Flare and C.M.E.) Another "thing" is the Coronal Hole which is an opening in the Sun that speeds up the solar wind. Both (When the interplanetry field is tilting South) can cause geomagnetic activity. When the CME or Solar wind hits the atmosphere. The Upper layers of the Ionosphere ionise more which enhances the skip. Then as the energy gets further down, the "D" layer intensifies (This layer is what makes Medium Wave good in the day by absorbing the skywave) and shuts down the lower HF bands. Then you get the Aurorae which blocks signals with a polar path. On upper HF bands and VHF you get the classic "Tone A" which makes Morse sound rough and SSB sound like someone whispering into the mike Hope that helps a little Tony



29AMK32	14 Jul 2012 - 00:21 Post #9
29 Charlie Tango 032 Posts: 186 Group: MemberF Member #1,515 Joined: 23-Jul 2011 MANDATORY_Country Republic of Ireland MANDATORY_Location donegal MANDATORY_FirstName Alan	BigTone 13 Jul 2012 - 22:47 A bit confusing at the moment. I would think that might have been Sporadic E which is not tied into solar activity (We are at the peak of the Es season) But the Sun is active so I dont know with any certainty. To properly answer your question will be a bit long winded. Solar flares are rated on X Ray output. As the saying goes, a picture is worth a thousand words http://www.swpc.noaa.gov/rt_plots/xray_5m.html The sunspots are areas of magnetic disturbance giving cooler spots. When the magnetic fields are twisted up things snap and plasma is released (Flare and C.M.E.) Another "thing" is the Coronal Hole which is an opening in the Sun that speeds up the solar wind. Both (When the interplanetry field is tilting South) can cause geomagnetic activity. When the CME or Solar wind hits the atmosphere. The Upper layers of the Ionosphere ionise more which enhances the skip. Then as the energy gets further down, the "D" layer intensifies (This layer is what makes Medium Wave good in the day by absorbing the skywave) and shuts down the lower HF bands. Then you get the Aurorae which blocks signals with a polar path. On upper HF bands and VHF you get the classic "Tone A" which makes Morse sound rough and SSB sound like someone whispering into the mike Hope that helps a little Tony Ok my brain is a little melted now... So whats good for upper HF BANDS... See iam just wondering because instead of me sitting in front of radios wondering when things are gonna pick up and me looking at websites like solarham.com etc trying to make sence of it all and saying to my self "so does this mean things are going to be good or bad". Bottom line is i would like to be able to just look at the solarham website and say to myself "oh things are going to be crap today or the radio is going to be good later on today" So if i knew what i was looking for it would help greatly.. I hope i havent confused you any further



Sam WD40	21 Jul 2012 - 14:30 Post #10
26 Charlie Tango 747 Posts: 784 Group: MemberAF Member #747 Joined: 2-Jan 2011 MANDATORY_Country England MANDATORY_Location Kettering Northants MANDATORY_FirstName Sam	What is really needed is someone to say what to look for in plain simple lingo as in what to look for and what the M-class and X-class SFI-index Xray Bzmag MUFboulder ect really mean and what to look for to get a good days propagation



Cherokee	21 Jul 2012 - 17:51 Post #11
Da Injun Posts: 12,976 Group: Admin Member #6 Joined: 24-Jun 2009 MANDATORY_Country Wales MANDATORY_Location The Vale of Glamorgan MANDATORY_FirstName Steve	SAM WD40 21 Jul 2012 - 14:30 plain simple lingo as in what to look for and what the M-class and X-class SFI-index Xray Bzmag MUFboulder Sorry Attached to this post: DocEmmet_Brown.jpg (34.19 KB)



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