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Posts Tagged ‘filaments’

The Sun – 18th April 2015

April 18, 2015 Leave a comment

video0019-15-04-18-12-19-00-rotatedAbove: Ha Disk

video0020-15-04-18-12-27-56Above: CaK Disk

There’s a nice string of sunspots on the Sun now with active regions 2321, 2324, 2325, 2326 and 2327 all visible. Prominence activity is low in Ha, but there are some fine filaments arcing around the main sunspots and further out on the north limb.

Images taken 18/4/15 12.14 – 12.27 UTC+1 using Coronado Ha PST and CaK PST and DMK41 camera. Processed in Registax 6 and Photoshop CS2.

The Sun 27/3/15 – Big changes on the limb and a few new sunspots

March 27, 2015 Leave a comment

diskproms2-15-03-27-15-36-5

Ha Disk

The splendid hedgerow prominence from yesterday has gone ! The magnetic field holding all of that plasma together became unstable and the material was ejected off into space at around 13:00 today. Things change fast on the Sun and that is why it is such a fascinating object to observe. The coronal mass ejection from this event is not predicted to have any major impact on Earth.

So what else is there to see ? Well there is a good smattering of feathery, curving filaments across the disk in Ha light and Active Region 2305 is smack in the centre, but not really putting on much of an energetic show. It has split onto three sunspots now and the CaK view shows up lots of other small spots and pores (2310, 2312 1and 2313)  extending off to the limb. In the east (east and west are inverted in the disk view above) there is one large prominence left on the limb.

hapromsclose-15-03-27-15-52 The single large prominence on the east limb

HaArclose-15-03-27-15-49-36Active Region 2305 in Ha light showing the filaments to the left and finer curving magnetic flux around the sunpsots

cakdisk-15-03-27-16-00-02vdThe Sun in CaK light showing active region 2305 at the centre and additional spots and pores