The Sun was really active two days after you took that photo. In the northern hemisphere, folks all the way down to Poland, Germany and Ukraine were seeing aurora under city lights.
Unfortunately, it is rainy and cloudy here. If not for that, we (northern Oregon) have a darn good chance of catching the aurora). This is the aurora oval as I write:
Here is another interesting H-alpha image, taken on May 9, 2016.
(SolarScope SF-50 etalon on Borg 55FL and PowerMate, autoguided on a Takahashi EM-11 mount by the Hinode solar guider; homebrew image capture software.)
What is so special about the date? It was the Mercury Transit.
You can see Mercury as a small black dot that is not too far from the limb of the Sun at between 1 o'clock and 2 o'clock. Also an "eclipse" :-).
Chen
