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The Sun 24th April 2015 – Huge Prominence !

April 24, 2015 Leave a comment

diskproms-15-04-24-07-37-47

Occasionally the activity on the Sun is just visually stunning and this is one of those occasions. I had been tracking solar activity remotely via the GONG worldwide solar monitor here http://halpha.nso.edu/ and noticed this huge extended hedgerow prominence developing on the NE limb. Having missed an opportunity to image it yesterday I though I would get up early before the cloud and rain rolled in this morning to capture some images. I was extremely lucky to get a decent view in rapidly deteriorating conditions. Within 15 minutes of starting to take images the cloud had completely covered the Sun ! As a bonus there was also a prominence lifting off the surface in the west – what a fantastic sight ! Images taken 7.35 to 7.50 am (UTC+1) 24/4/15 Coronado PST Ha and DMK41 camera

bigrom

Above: A close up view of the huge hedgerow prominence on the north east limb

liftoffprom2-15-04-24-07-49Above: On the right a prominence can be seen lifting off from the surface of the Sun due to the magnetic field disconnecting, hurling hot gas plasma thousands of kilometres off into Space

Categories: Solar Tags: , , ,

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