Sunspots visible for 2 Sept 2017

[davenn]

A quick shot of the sun this morning
Nth lower left, East limb lower right

400mm telephoto = x2 teleconverter, 500th sec, f11

 

[Drakkith]

Very nice! I'm guessing that big sunspot is probably larger than the Earth?

Nth lower left

Nth = North?

400mm telephoto, 500th sec, f11

What kind of filter do you have on your camera?

 

[davenn]

I'm guessing that big sunspot is probably larger than the Earth?

I haven't seen any specific comments but would also guess about the same size to a bit bigger

Nth = North?

yup ... my usual abbreviation

nth, sth ...

What kind of filter do you have on your camera?

this ...

http://www.telescope.com/Accessorie...lescope-Solar-Filters/pc/-1/c/3/sc/48/e/4.uts

That's the 100 - 400 mm lens with a 2 x adaptor on it

 

[websterling]

A labeled image from about the same time that shows the scale of Earth and Jupiter.

 

[davenn]

The large group continues across the sun
there has been new spots appear to the east of this long string of spots plus a new set coming around the east limb

4th Sept 2017
400mm telephoto = x2 teleconverter, 500th sec, f11
rotation is from lower right to upper left ( as seen through my camera)

You can also see the smaller single spot up from the large spot chain has also evolved into a much more complex structure over the last 24 - 48 hrs
you can view this animation ( Note, the image source has corrected image orientation) ...

http://www.spaceweather.com/images2...anim.gif?PHPSESSID=0u7620108s1at1gnt6ilu816i5

There have so far been 3 M class flares recorded. Not sure which group they originated in ?

Dave

 

[davenn]

The Sun

4th Sept 2017
400mm telephoto = x2 teleconverter, 500th sec, f11
rotation is from upper right to lower left ( as seen through my camera)

The upper group continues to grow in size and complexity and it is also becoming more active

Quite a number of solar flares have occurred over the last 24 - 36 hrs. Both spot numbers and flare count
is the highest it's been for many month

Approximate Flare Maximum: 04-09-2017 0549 UT at Flux M 1.3
Approximate Flare Maximum: 04-09-2017 1531 UT at Flux M 1.5
Approximate Flare Maximum: 04-09-2017 1822 UT at Flux M 1.0
Approximate Flare Maximum: 04-09-2017 2033 UT at Flux M 5.5
Approximate Flare Maximum: 05-09-2017 0108 UT at Flux M 4.2
Approximate Flare Maximum: 05-09-2017 0351 UT at Flux M 1.0
Approximate Flare Maximum: 05-09-2017 0453 UT at Flux M 3.2
Approximate Flare Maximum: 05-09-2017 0640 UT at Flux M 3.8cheers
Dave

 

[davenn]

The Sun today -- 6 Sept 2017

2 large spot groups continue to dominate the solar disk

 

[websterling]

The Sun has been quite active today- 2 X class flares since 0900UT.

My reaction when I first saw this is unprintable here!

 

[davenn]

The Sun has been quite active today- 2 X class flares since 0900UT.

View attachment 210473

My reaction when I first saw this is unprintable here!

Only one X class is listed, an X9.3 which is huge !

that other one after 0900 UT was a M7.7Dave

 

[websterling]

The plot indicates that the 0900UT event was in the X1 - X2 range.

 

[davenn]

The plot indicates that the 0900UT event was in the X1 - X2 range.

it's been officially listed as a M7.7

 

[Stavros Kiri]

Excellent photography in this thread! Regarding the two dominant spot groups (AR2674 and 2673), here is an interesting short video:

Also, regarding the monster X-class flares (just today 6 Sept), here is another one:

 

[websterling]

Not trying to be contrary, but these 2 lines are from the Space Weather Prediction Center's Edited Events list for today- they show the events as x2.2 and X9.3

#Event    Begin    Max       End  Obs  Q  Type  Loc/Frq   Particulars       Reg#
#-------------------------------------------------------------------------------
7250       0857   0910      0917  G13  5   XRA  1-8A      X2.2    1.3E-01   2673

7340 +     1153   1202      1210  G15  5   XRA  1-8A      X9.3    5.7E-01   2673

The full file is available at - Edited Events for 2017 Sep 06

 

[Stavros Kiri]

Not trying to be contrary, but these 2 lines are from the Space Weather Prediction Center's Edited Events list for today- they show the events as x2.2 and X9.3

And the videos from NASA initially mentioned X2.2 and X9.3 ... but that may have changed later (?) ...

Also, here comes the CME ... (announced just over an hour ago):
"Latest news

Wednesday, 6 September 2017 - 21:09 UTC
X9.3 earth-directed coronal mass ejection
More news"