Thursday, 13 November 2014

I'm back! AR12209.


Two views of the 'returnee' -old AR12192 - courtesy of the SDO satellite.  'Helio' freeware showed the limb longitude is 238 deg. and all the major spots of the group are now visible  in the 4"Mak, X80. But much reduced. A very rough 'Helio' area was between 400 and 800 units. It will look more impressive in coming days. Consider the magnetic complexity of the lower image!

Tuesday, 11 November 2014

AR12192 X3 flare Oct24

This complex spot group had six GOES class-X flares - this X3.1 was the strongest on Oct 24. The blue outline X-X' and Y-Y' is from SDO HMI magnetogram -  it suggests the inversion line between opposite polarities within the group. Notice the small cluster of 'red' spots within the dominant 'violet' spot - and how the inversion line winds around them! The peak of this flare (X3.1) was missed - here we see it ~40m later: X1.1. Perhaps the flare arose along the N and W sides of line Y-Y', as the brightest ribbon spread well to the S of the group. Rumor suggests there were no CME's from this group? Yet the disruption of coronal fields and the ejection of a filament (i.e. mass) precedes all flares? Doesn't it?

AR12192 Returns?

Judging by these coronal streamers above the 12192 site - just behind the limb Nov 11UT- 'something' of the Giant spot has survived. Grown even larger, perhaps?

Tuesday, 4 November 2014

Giant! AR12192

According to Janssens' this is the 12th largest sunspot group since records began in 1874! He's got the data to prove it. It is a bafflingly complex group - note the inversion line between opposite polarities (blue line) -(c) SDO Satellite. Why did it grow so big? Back in Sept. 2014 it probably began as AR12172 - but late in that month the already large group was joined by myriad small new spots covering a wide area, Shaken and stirred during its far-side transit - and THIS is what returned: AR12192! An amazing group. It will return to the east limb about November 12th. Stay posted!