The Dutch Observatory

On a day when the clouds and rain returned to Oxford, the Sun had to develop another active region and sunspot!  So in my frustration, I went to work on two composites showing the morphology of AR2735 and AR2736 in hydrogen alpha and 540nm filters.  Here the results and apologies for the very bad quality of the resampled thumbnails caused by the odd shape of the image.  The quality of the full size image is much better but still a bit compromised because of the seeing conditions during the capture, but I like the way they came out.  Unfortunately the field of view in the 540nm images is too small to show the entire area in one image, but I show both regions on the same line for 2019-03-20.

Some thin cirrus clouds with below average seeing. The Sun is still spotless this morning.  The prom from the last three days has pretty much disappeared and only a thin faint sliver could be seen.  A filament can be observed near the northern limb. Only full disk images today.

Clear skies with average transparency and seeing.  Another spotless day.  The filament is still nicely visible but the NE Prom is much lower as it turns onto the visible hemisphere.  I also included a combo of the prom over the last three days.

Clear skies with below average seeing.  Counting 420 spotless days since solar maximum. No spot to see, but the filament from yesterday is still there as well as the NE prom.  In addition there are some smaller proms at the higher latitudes at the SE and NW limbs.

Clear skies early today, so I took the opportunity! A spotless Sun again, however we have a small filament near the Southern limb as well as a nice filament and parallel prom at the NE limb. Waiting for more spotless days.

Clear skies with good seeing.  AR2736 is still visible at the western limb as it continues to decay, but will soon be on the backside.  A few small filaments are visible at the NE limb and in the southern hemisphere.  Total Active Region Area for today is 280 millionths and 12 spots. I also included a small composite of AR2736 of today.

Clear skies with average seeing.  AR2736 has grown to 420 millionths and contains 17 spots.  Overall however it seems to be decaying. A nice prom is visible next to the area at the western limb and a filament in the south.  Full disk images today and closeups of AR2736.

Clear Skies with average seeing.  AR2736 has been pretty busy and has evolved to a Dki area.  Since it popped up it has produced 11 B-class flares and 11 C-class flares so far of which the highest, a C5.6,  was observed yesterday. AR2735 has decayed and is now a plage.  Total coverage of AR2736 is 210 millionths and 28 spots and the Wolf number is 38.  Today full disk images and close ups of the active region.

Clear skies with below average seeing.  AR2735 has decayed to an Hrx area but we have a promising new Cro area, AR2736, which in the morning hours already produced a C-class flare.  Today full disk images as well as close ups of the two mentioned regions.

The skies cleared around 11:30 with below average seeing.  AR2735’s leading spots seem to hold on, and the coverage has not changed a lot.  The filament to the NW of the region looks interesting as well as a second very faint filament in parallel to it,  between the filament and the area. Total Active Region Area for today is 10 millionths with three spots.  Today full disk images and close ups of the mentioned regions.