The ending of the solar filament phenomena can trigger a huge magnetic event.
Filaments can float sedately for days before disappearing. Sometimes they also erupt out into space, releasing solar material in a shower that either rains back down or escapes out into space, becoming a moving cloud known as a coronal mass ejection, or CME.
NASA's SDO Sees Giant Filament on the Sun
Solar filaments mysteries
Why can some solar filaments have 'beading' or double filaments?
Why do some sun filaments create Hyder Flares?
Electric solar filaments
While a flare originates from the physical surface of the Sun, filaments are simply the huge swathes of solar material (mostly plasma) that are suspended above the surface due to the huge magnetic forces being created by the star.
Watch The Sun Launch A Giant Solar Filament Into Space