Clouds are weird yo.
A major solar flare produced an arcade resembling a slinky. That flare has been featured here before, but this time we are showing a set of composite images that shows the thermal evolution of the material. The X5.7 flare occurred at 10:03UT on 14 July 2000, in Active Region 9077, and was observed by TRACE in three colors: the red image shows the ultraviolet continuum, generally characteristic of cool, dense gas; the blue image shows the 171Å pass band, characteristic of material around 1 million degrees; the green channel shows material hotter than about 1.5 million degrees up to approximately 10 million degrees.
The top image is a collage of six images. Frame 1, right after the onset of the flare, shows very bright, rapidly evolving flare kernels and the beginning formation of ridges, or ribbons, that give this “two-ribbon flare” its name. Frame 2 shows an image around 10:25UT, 22 minutes later, when the ribbons have developed along much of their length, and loops connecting them are showing up on the right-hand side of the arcade. Frame 3 shows a bright ridge between the ribbons; this is presumably very hot material, but it remains unclear whether that lies below or above the now cooling loops connecting the ribbons. Frame 4 shows green loops forming on the left-hand side, that cool to blue in frame 5. In Frame 6 most of the arcade loops have cooled to around 1 million degrees.
Because TRACE observes gas of very different pass bands, it allows us in principle to perform a very detailed study of the thermal evolution of this flare, which was very large, and caused the largest particle storm of the cycle thus far.
Credit: TRACE, Stanford-Lockheed ISR, NASA
|—||Nelson Mandela (via whats-out-there)|
|—||Nisargadatta Maharaj (via cosmofilius)|
|—||Franz Kafka (via chiisensei)|
Too Many Stars To Count
Image Credit: Chad Powell