Quite a lot of activity this morning but AR2738 still dominates the show. The white light “split” is now quite clear.
“IS SUNSPOT AR2738 SPLITTING IN TWO? The primary core of sunspot AR2738 is divided by a brilliant canyon of light–also known as a “light bridge“–measuring some 20,000 km from end to end. – – – – The light bridge is only about 800 km wide–less than the width of the state of Texas. His image captures not only that narrow divide, but also hundreds of surrounding granules on the sun’s boiling surface .
The nature of light bridges is not fully understood. They often herald the break-up of a sunspot. Some research suggests that magnetic fields at the base of a light bridge are busy cross-crossing and reconnecting–the same explosive process that sparks solar flares. Does this mean sunspot AR2738 will explode–or quietly fall apart? No one can say.”