02 April 2013

Polar Solar Weekend!

Public Solar Viewing Saturday & Sunday April 6th & 7th:
Sat 11 - 3PM: Cupertino's Earth Day @ Cupertino Civic Center
Sun  2 - 4PM: SJAA's H+AlphDay @ Houge Park

POLAR FILAMENT ERUPTION: Not every eruption requires a sunspot. On April 1st (no fooling) a magnetic filament snaking some 800,000 km around the sun's north pole rose up and erupted, hurling part of itself into space. NASA's Solar Dynamics Observatory (SDO) recorded the event; 7 O'Clock on the solar dial:

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