I have a doubt about the active regions AR3701 and AR3703: one group (class F Zurich) or two separate ones (class D)? With Helio Viewer they are 10° apart from each other, while if taken as a single group they have an extension of 21°. The latitude is practically the same, with 3701 slightly lower (Joy's law?).
Maurizio
Hi Maurizio -
I have watched these groups evolve (separately) and it appears to me that they are indeed 2 separate bipolar groups. It is useful when you get a lot of sunny days and you can watch them evolve.
KL
thanks, doubts removed!