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#1319639 - 18/03/2015 08:18 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Dipole Offline
Weather Freak

Registered: 10/01/2013
Posts: 328
Loc: Hervey Bay 48m,Tuross Head
Thanks for the news,Ken and Sunny, exciting event !

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#1320443 - 19/03/2015 19:20 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: Dipole]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
This is mind-blowingly beautiful

Strongest geomagnetic storm of SC24 spar... March 18, 2015

Duck.

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#1320446 - 19/03/2015 19:23 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Ken Kato Offline
Weatherzone Addict

Registered: 05/03/2012
Posts: 4674
That reminds me, here's some of the aurora photos taken around SE QLD just over 100km northwest of Brisbane (between Yarraman and Blackbutt) the night before last night by Jeanette Lamb who shared them on the Aurora Australis facebook page:

https://www.facebook.com/media/set/?set=oa.1066979109982853&type=1

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#1320872 - 20/03/2015 14:46 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
VK4FABB Offline
Cloud Gazer

Registered: 17/03/2015
Posts: 9
Loc: Biloela, QLD, Australia
These solar flares are making it every hard to use HF Radio, nothing but noise and anything over between 50km-600km is near impossible
_________________________
Brandon Gordon
VK4FABB
Biloela, Central Queensland, Australia

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#1321297 - 21/03/2015 22:29 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Mamma Tus Offline
Weather Freak

Registered: 23/12/2011
Posts: 344
Loc: NE NSW
Wow SD, I have just been reading your updates on the 'solar weather' and it is truly fascinating stuff! The images are stunning, how amazing that all this glory is playing out right over our heads as it were (granted, its all happening waaaayyy above our heads)! Will definitely be a regular lurker on this forum now, thanks for bringing a little piece of the heavens to earth and keep up the great work:)
_________________________
"Clouds are the sky's imagination." ~Terri Guillemets

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#1321656 - 23/03/2015 22:08 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
SunnyDays Offline
Weatherzone Addict

Registered: 30/01/2011
Posts: 1615
Loc: Oxley Brisbane Qld
Hi Everyone,

Finally stolen some time to post tonight about the strongest, most intense geomagnetic storm experienced this Solar Cycle 24.


WHAT SPARKED THE Kp=8 or G4 LEVEL GEOMAGNETIC STORMS?



Well you may be surprised! It was no where near a powerful high end M-Class or X-Class flare that we may think would be responsible, but it was a slow or long duration C9-Class Solar flare coupled with that of a fiery filament eruption, near simultaneously, off the Sun's surface.


It started on March 15th, active region 2297 produced a long duration C9-Class flare peaking at 02:13 UTC. The Solar flare dis-stabilised a filament hovering nearby, which when it erupted caused the CME. As the CME approached Earth, the Solar wind speeds increased to near 700 km/s and the Bz component of the interplanetary magnetic field (IMF) pointed sharply south. The maximum reading was (-20 to -25nT) and fluctuated for a long time south, thus helping to intensify storm conditions. All the charged particles were entering Earths back door sparking what was some of the most spectacular Aurora seen in ages. NOT to forget mentioning in mid latitudes, as high as Brisbane.

Amazing... and I missed it. Rrrrrr I didn't follow my gut when I saw the Auroral oval so intensely red as I climbed into bed, I didn't go to check out the readings and of course slept like a baby through the whole night.


AR2297 was in an Earth facing position at the time shown here in this image. It was one of three sunspot active regions on the Solar disc at the time.




The duration of the Solar storm is shown below on the Planetary K-Index - for nine hours the solar storm registered at KP=8 or G4 Level with only a small 3 hour window where it dipped to Kp=7. Perfect example how Solar winds can fluctuate when inbound.







The C9-Class Solar flare


The following imagery shows the C9-Class solar flare with the filament.

To view and animation of the C9-Class flare - http://sdowww.lmsal.com/sdomedia/h264/20...-171_S22W29.mov

Such stunning imagery on the animation showing the ripple or tsunami affect of the filament erupting. I could watch this for ever smile below is just a quick still image from several.








Imagery of the CME



From the SDO spacecraft
the following CME was captured billowing out from behind the coronograph.

Though it is a PITY NASA... Why is there imagery missing a whole 3.5 hours of footage!!! (if you are reading).






From Cactus Lasco-C2 another view of the powerful CME as a result of the explosion.

To view the animation click on this link - http://sidc.oma.be/cactus/catalog/LASCO/2_5_0/qkl/2015/03/CME0072/CME.mov






Here is the animation of the incoming CME on ISWA - Earth is the little yellow dot to the right. You can see it was only a side swipe or edge of the storm cloud that brushed past Earth.

To view the animation click on this link - http://iswa.ccmc.gsfc.nasa.gov/IswaSystemWebApp/StreamByDataIdServlet?allDataId=841848081






And for those of us who missed it here is some footage from YouTube of the beautiful auroas.









On that beautiful note I will bid you good night. I love our star, she is the giver of all life.

Sweet dreams
SDx


Edited by SunnyDays (23/03/2015 22:14)
Edit Reason: fixing errors
_________________________
________________________________________
Anyone who says sunshine brings happiness has never danced in the rain smile

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#1321697 - 24/03/2015 09:43 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Ken Kato Offline
Weatherzone Addict

Registered: 05/03/2012
Posts: 4674
That 3rd image is a particularly stunning shot there SunnyDays.

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#1328060 - 06/05/2015 09:06 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Locke Offline
Weatherzone Addict

Registered: 27/12/2007
Posts: 4360
Loc: Brisbane
Just received notification of a powerful X2.7 solar flare. Wonder if it came from sunspot AR 2235 which is now directly facing Earth or AR 2239 which is just rotating into view.

Stay tuned to see whether this flare has generated a geo-effective CME.
_________________________
This post and any other post by Locke is NOT an official forecast & should not be used as such. It's just my opinion & may or may not be backed by sound meteorological data. For official information, refer to Australian Bureau of Meteorology products.

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#1328067 - 06/05/2015 10:03 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Locke Offline
Weatherzone Addict

Registered: 27/12/2007
Posts: 4360
Loc: Brisbane
OK. It was sunspot AR2239 that was the culprit. So if there was a CME produced by this event it is highly unlikely that it was Earth directed.

Still, this sunspot will be rotating to face Earth in coming days so we'll have to see whether it produces any further X class flares.
_________________________
This post and any other post by Locke is NOT an official forecast & should not be used as such. It's just my opinion & may or may not be backed by sound meteorological data. For official information, refer to Australian Bureau of Meteorology products.

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#1332330 - 22/06/2015 11:24 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Ken Kato Offline
Weatherzone Addict

Registered: 05/03/2012
Posts: 4674
Three CME's impacting Earth early to mid this week... one's already arrived (weak) and two are about to. One of them's a full halo one and meeting the NOAA G3 Strong category although will be interesting to see if our planet does end up copping the full force of it. Cloud cover might make sightings hard in areas like TAS though.

Some SWPC text below as well as an aurora forecast from SpaceWeatherLive:


Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.

Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.

Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.

Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.

Radio - HF (high frequency) radio may be intermittent.



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#1332338 - 22/06/2015 12:40 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
Hi folks.

A full halo emission from the sun;



Duck.

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#1332356 - 22/06/2015 18:08 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Petros Offline
Meteorological Motor Mouth

Registered: 30/12/2002
Posts: 6595
Loc: Maffra, Central Gippsland, Vi...
Thanks Duck, that initial video is the last of the three CME's that Ken alluded to? - or a typical demo?

Re: "Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices" in the presumably BOM's detail on Kens post:

The Australian Energy Market Operator (AEMO) this afternoon issued a warning on possible impact of a CME on the Australian energy grid in the 48 hours from lunchtime.

I haven't seen them issue one of these before, presumably because Tassie (lat 41-42 deg) is close to the 150 deg max impact area posted by BOM's Solar Watch.

I subscribe to the BOM Solar warnings due to work (HV power system stuff), and must admit that todays warning notifying this present/past sequence of 3 CME's didn't alert me to "uber-high" values. Always learning I guess! frown

Also regarding - "Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices".

That's exactly why I subscribe to the alerts, but not due to "false alarms" on protection devices. More so because such events can cause actual/real high DC currents to flow on our major HV longer power lines between neutral-earthed HV transformers situated at Terminal Stations at each end of very long (>75 KM) power transmission lines, which are of course, designed to operate at 50Hz. My understanding is that major CME events can create temporarily different ground potentials between normally like-potentialled Terminal Stations on the earths crust.

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#1332371 - 22/06/2015 21:12 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
davidm Offline
Weatherzone Addict

Registered: 08/08/2011
Posts: 1553
Loc: Orange, NSW
Didn't know this topic existed until tonight! Have been following this event over the past few days and will be keeping a very close eye on the graphs over the next few hours.

Seeing spikes in the magnetometer possibly indicating the arrival of the CME. Speed is on the rise and density is getting up there too, nowhere near the predicted levels yet though. The proton flux is what's interesting me on this one, just seems to keep rising and rising.

Have only really been following the space weather stuff closely for a few months now - this'd be the first big CME I've really paid attention to. Gotta say, it's a lot of fun. grin
_________________________
Wunderground | davidm.com.au

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#1332373 - 22/06/2015 21:25 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: davidm]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
Hi folks.

The Victorian Storm Chasers on Facebook are mentioning that we may be able to see an aurora in Melbourne tonight...I hope so smile
The Duck has got her specks ready.
Cheers.

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#1332383 - 22/06/2015 22:12 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 1859
Loc: Blue Bay N.S.W
No repeat of 1859 I hope. We humans sure take electricity for granted.
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The deep blue skies of youth are unlike any other.

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#1332385 - 22/06/2015 22:34 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: Knot]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
Hi Knot.

Found this on the 1859 event;

"The Carrington Event and the Electric Telegraph in Victoria"

and Wiki's record;

Solar storm of 1859

Just for interest sake...I've learnt something reading these.

Cheers, Duck.

Oh and I read somewhere else (forgotten where) that cracking sounds and bangs, like the ones I heard at 2am this morning, can be produced by what the sun is doing at the moment...I wonder if there was a connection (re: what I heard???)??

Found the source - re: noises;

Quote:
Folktales and travellers' tales say that the aurora can generate noise such as claps, crackles, and static sounds, usually faint and brief. For a long time scientists were dubious, since sound has been hard to document, and auroral displays themselves are too high in the sky for them to be heard on the ground. However, researchers from Aalto University in Finland published a study in 2012 saying that they recorded "clapping" sounds correlated to the visual presence of the aurora borealis, and that these sounds were produced approximately 230 feet (70 m) above ground. They suggested that these sounds come from the solar particles associated with creating the aurora. The University of Alaska notes that aurora noise is so rare that hearing it is a "once in a lifetime experience", possible only during times of maximum aurora activity, on windless nights away from other noise sources.
Pittwater Online News 2013


Edited by duckweather (22/06/2015 22:42)

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#1332392 - 23/06/2015 02:28 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
davidm Offline
Weatherzone Addict

Registered: 08/08/2011
Posts: 1553
Loc: Orange, NSW
KP has just hit 5. ACE is very slow to update at the moment but looks like the speed might be bumping up a bit, impact shouldn't be far off now.
_________________________
Wunderground | davidm.com.au

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#1332397 - 23/06/2015 07:18 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Ken Kato Offline
Weatherzone Addict

Registered: 05/03/2012
Posts: 4674
Very nice aurora photos emerging from the overnight hours (with the chance Kp values could even exceed 8 during the next hour or two):

Sydney, taken by Jarrod Castaing:
https://www.facebook.com/photo.php?fbid=10152875365806976&set=gm.1048946561806893&type=1

Dorrigo in NSW, taken by Dan StewStew:
https://www.facebook.com/photo.php?fbid=...hc_location=ufi

Canberra, taken by Ian Williams:
https://www.facebook.com/groups/auroraaustralis/permalink/1048944808473735/?hc_location=ufi

Langwarrin in VIC, taken by Bronwyn Carnegie:
https://www.facebook.com/auroraserviceAUS/posts/1020795661265766

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#1332399 - 23/06/2015 07:44 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
Ken Kato Offline
Weatherzone Addict

Registered: 05/03/2012
Posts: 4674
There's also just been another eruption of activity from the same region of the sun which has produced the current CMEs with a long lasting X-flare. But remains to be seen whether the impacts from any resulting CME will be as severe as the current one.

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#1332408 - 23/06/2015 09:46 Re: Solar Watch - Spaceweather 2011 - 2013 [Re: SunnyDays]
ozone doug Offline
Weatherzone Addict

Registered: 06/11/2006
Posts: 1663
Loc: Roma SW QLD Eye to the West...
Yeah this is a fairly strong event . Hf radio to 15 mhz wiped out completly and degraded to 30 mhz. Southern capitals might get a look at some nice colours at night time .Hope it don't do any damage in the northern hemesphere power grids .
_________________________
Cheers Doug. 491 Doug/ uhf ch50 and ch40 When severe weather
BOM Stormspotter G0388 Roma S W Queensland Formerly Redcliffe.
https://www.wunderground.com/personal-weather-station/dashboard?ID=IQUEENSL852

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