2015 Oct. 17 Sun -AR12434
As AR12434 moves towards the central part of the disc, more details are visible.
This animation focuses on the small "ring of fire" SE of the the sunspot.A sudden violent eruption takes place at about 10:46.Materials surges up at high speed as evidenced by the large dark filament that surges from this ring towards south.
Telescope: AP Starfire EDT 155 mm f/9.
stopped to 50 mm for disc images, with 4X telecentric lens (f/36) for closeups
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter
Camera: Imperx 4M15
North is up, and east to the left.
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