Friday, 24 April 2020

No Active Region in CaK - 22nd April

For a week or so the chatter online has been there was a new active region on the far side of the sun as seen with the STEREO spacecraft.  This got smaller and fainter as it approached the near side limb, and indeed, when it came around there was very little to see other than a patch of plage.  There have been a few very small pores over the past couple of days that have come and gone, and has shown brightening in Ha now and then, but this is unlikely to develop into anything.  It's equatorial position and magnetogram data tells us it is cycle 24 activity; there can't be much left in cycle 24 now surely?