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Scientists who study solar weather try to find patterns in the violent, chaotic motion of magnetic field lines above the sun's surface. Though the lines aren't actually visible, their patterns are illuminated by the streams of hot plasma that travel along them. But, while the giant coronal loops that form during major solar storms are easy to pick out, the field lines are generally so tangled up that it's hard to pick any one of them out.
To help solve that problem, researchers can apply a gradient filter to the images. The filter increases contrast, bringing the solar weather patterns into focus.
Click on the image below to use a slider to compare a photo of the sun, with and without the gradient filter:
And check out NASA's excellent visualization of the gradient sun here.
As the eruption at Hawaii's Kīlauea Volcano continues to evolve, the multitude of dangerous threats to residents are showing no signs of subsiding.
A massive, powerful cyclone churning over the Arabian Peninsula caused catastrophic damage on the islands of Socotra this week.
Ahead of bank holiday Monday, thunderstorms could turn severe across much of Wales and England on Saturday and Sunday.
Racers and spectators will have to prepare for hot and steamy conditions for the 2018 Indianapolis 500, which is set to take place Sunday, May 27.
While newly formed Alberto is expected to target the upper Gulf Coast this holiday weekend, the risk for major flooding in the southeastern United States may extend beyond Memorial Day.
Las zonas de la costa este de México y el oeste de Cuba pudiesen experimentar fuertes lluvias y aumento en las marejadas en las próximas horas.
There are more deaths due to flooding than from any other thunderstorm-related hazard and most occur when a vehicle is driven into hazardous floodwaters. These drownings are preventable with proper safety precautions.
Though using sunscreen is an important practice all year round, it is especially vital in the summer. Check out the key important factors in using the right sunscreen in the right way.