GIANT SINE WAVE: Imagine a sine wave 400,000 km long. Today, NASA's Solar Dynamics Observatory is monitoring just such a structure. It's an enormous filament of magnetism slithering over the sun's northeastern limb:
One of the wave troughs appears to be passing through the core of sunspot 1283. If so, an eruption of the sunspot could have an interesting ripple effect on the greater filament, perhaps even causing it to collapse.
http://spaceweather.com/
