22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

this is the main message area for anything solar :)
Post Reply
EGRAY_OBSERVATORY
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6871
Joined: Mon May 18, 2020 4:45 pm
Location: Essex, S.E.England
Been thanked: 4900 times

22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by EGRAY_OBSERVATORY »

A few hours ago AR2816 gave-out another Flare & CME towards Earth this time.

" Another significant-flare/CME from AR2816 - which I half expected was likely as " EARTH-DIRECTED SOLAR FLARE: Sunspot AR2816 has produced another solar flare... This time a C3.8-class eruption on April 22nd (0435 UT).

A pulse of X-rays and UV radiation ionized the top of Earth's atmosphere, producing a minor shortwave radio blackout over South-East Asia.

NASA's Solar Dynamics Observatory recorded a shock-wave rippling away from the blast site; this suggests a CME is heading our way. "

Terry
Attachments
22-4-2021 1029z latest_1024_211193171.jpg
22-4-2021 1029z latest_1024_211193171.jpg (182.08 KiB) Viewed 573 times


User avatar
ffellah
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 11172
Joined: Mon Oct 27, 2014 6:46 pm
Location: Westport, CT USA
Has thanked: 9145 times
Been thanked: 6025 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by ffellah »

Thank you Terry for the heads up.

Franco


EGRAY_OBSERVATORY
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6871
Joined: Mon May 18, 2020 4:45 pm
Location: Essex, S.E.England
Been thanked: 4900 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by EGRAY_OBSERVATORY »

Many thanks Franco.
With my observatory now fully-operational and some well-nice clear-skies here, I have even been playing with telephotos which will be posted here shortly.

All the mods are working very well and saving much time too..

Clear Skies for you..

Regards
Terry


User avatar
Montana
Librarian
Librarian
Posts: 34563
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK
Has thanked: 17672 times
Been thanked: 8791 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by Montana »

All good news, we need a nice active Sun to keep us entertained :)

Alexandra


EGRAY_OBSERVATORY
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6871
Joined: Mon May 18, 2020 4:45 pm
Location: Essex, S.E.England
Been thanked: 4900 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by EGRAY_OBSERVATORY »

Agreed Alexandra and especially as my skies are clear, as at last started some more experiments to improve from the previous...

Thanks vm
Terry


User avatar
DeepSolar64
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 18823
Joined: Thu Sep 05, 2019 12:19 am
Location: Lowndesville S.C.
Has thanked: 17572 times
Been thanked: 16694 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by DeepSolar64 »

Thanks for the update Terry.


Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces

Image Visual Observer
" Way more fun to see it! "
User avatar
Radon86
Almost There...
Almost There...
Posts: 779
Joined: Sat Mar 23, 2019 10:05 pm
Has thanked: 745 times
Been thanked: 660 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by Radon86 »

Hi Terry,
I also saw this flare today, on one of my panels on the western side near the North pole. I was imaging lots of panes for a full disk and noticed the flaring. It was almost disappearing on the limb though, so I could not get a better view.
Shame because it was really bright and the intensity was fluctuating clearly.

Magnus


Solar: H-alpha": Quark Chromosphere filter; Baader white light filters
Scopes: Altair Astro Travel ED70mm (F 420mm, D=70mm);; Skywatcher 90mm (F 910mm D=90mm); GSO focuser;;Altair Astro 60mm guidescope (D=60mm,F=225mm)
Cameras: ASI120mm-S,ASI174mm
Mount: SW HEQ5 Pro, SW EQ3 Pro Synscan (SW = Skywatcher),Vixen Polarie tracker (portable setup)
Accessory: SW Auto-focuser
Fed
Oh, I get it now!
Oh, I get it now!
Posts: 37
Joined: Mon Apr 19, 2021 6:49 pm
Has thanked: 18 times
Been thanked: 23 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by Fed »

Nooby question here. How long does it take for the CME to have effects (cell or radio disruptions) on earth after the CME is observed visually on earth?


EGRAY_OBSERVATORY
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6871
Joined: Mon May 18, 2020 4:45 pm
Location: Essex, S.E.England
Been thanked: 4900 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by EGRAY_OBSERVATORY »

Thank you Guys for the feedback.

Cheers James.

Hi Magnus, the flare I was referring to was AR2816 currently in the S.Central region, which, although I didn't see it, I gather was according to spaceweather.com was " NOAA forecasters say that G2-class geomagnetic storms are possible on April 25th when a coronal mass ejection (CME) is expected to hit Earth's magnetic field. The CME was hurled in our direction earlier today by a C3.8-class flare from sunspot AR2816 (details below). If the geomagnetic storm occurs as predicted, auroras could dip into northern-tier US states from Maine to Washington. " This occurred around 0400hrsZ this morning 22-4-2021.

The full story from spaceweather.com of the 22nd April 2021 as:- https://www.spaceweather.com/ including a movie and image of the event from SOHO/SDO...

You may well have spotted another flare elsewhere...

Hi Fed, X-ray emissions from a flare takes just 8mins20secs (speed of light) of an occurrence from the Sun to Earth and can often cause radio-blackouts at certain parts of the Earth - depending on its' rotational-view...
Normally Cell-phone infrastructure is not affect as they use UHF/SHF radio-frequencies (unless via satellite-links).
HF radio-frequencies and above can well be affected by this type of radiation though...

Based on/if - "The initial velocity of a CME was 760 km/s", then CME's themselves usually take around 80-hours/three days to hit Earth and often seen as Aurora...

I trust I have got the sum-answers correct and thanks for the questions...

CLEAR SKIES for me tonight, as a night-long session in the observatory...

Regards
Terry


Fed
Oh, I get it now!
Oh, I get it now!
Posts: 37
Joined: Mon Apr 19, 2021 6:49 pm
Has thanked: 18 times
Been thanked: 23 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by Fed »

Thank you for that. If i understand you correctly, the flare was at 0400Z april 22. It takes 80 hours to reach us, so it should arrive at 1200Z on April 25, or 6am EST on sunday. I am in Toronto, so the aurora might be visible, considering the projection of it stretching from Maine to Washington. Does this sound correct?

By the way, I did see aurora in Toronto from the 8th floor looking north way back in 2000. Faint, but clearly visible in the distance.


EGRAY_OBSERVATORY
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6871
Joined: Mon May 18, 2020 4:45 pm
Location: Essex, S.E.England
Been thanked: 4900 times

Re: 22-4-2021 AR2816 -SOLAR-FLARE & CME THIS MORNING

Post by EGRAY_OBSERVATORY »

Indeed Fed, I'm fairly certain you should see the N.Aurora by the night of the 25th, but if you can, have a look in the early hours of the morning of the 24th as well, as the times are not always too-accurate. Then anytime's of the 25th night should give you a good opportunity - if you don't mind losing some sleep..!!

Don't forget the camera and if able even post an image here, as it is Solar-connected...

Where you are, Auroras are fairly common if you are lucky to see them, whereas here in S.E.England they are quite-rare and I have only seen one faintly, but some others in the Southern-U.K., have seen them.
The higher up one can be, more good chances of catching them.

Spaceweather.com and https://virmalised.ee/aurora-forecast/ + other websites can give some idea of when and where...

Clear Skies
Regards
Terry


Post Reply