Solar Disk in the Calcium-K line

New sunspot 4300 erupted today (Dec.4th @ 0250 UTC), producing a strong M6-class solar flare. At the same time, the US Air Force detected a Type II solar radio burst, which means a CME is probably emerging from the blast site. Meanwhile, giant sunspot complex 4294-4296 remains ominously quiet.
Thanksgiving travelers were surprised last week when Airbus grounded roughly six thousand A320-family jets for an urgent software rollback. The cause of the delay? Fears of radiation from cosmic rays and solar storms!