Sun burst: Collapsing solar filament caught on camera
The ejection delivered a glancing blow to Earth’s magnetosphere, triggering a moderate level geomagnetic storm, the NOAA Space Weather Prediction Center reported. By Tuesday, however, radiation levels went below the minor event threshold.
A solar filament, also called a solar prominence if it is observed against space, consists of hot ionized hydrogen and helium looping hundreds of thousands of kilometers from the sun’s surface into the relatively hotter corona. It can persist for months before ceasing to exist.
Astrophysicists so far have no comprehensive theory as to how such structures are formed.