Dead Sunspot Explodes, Hurls Debris Toward Earth

April 11, 2022: 

The corpse of old sunspot AR2987 exploded today, April 11, 2022, hurling debris directly toward Earth. NASA’s Solar Dynamics Observatory recorded the eruption:

The S-shaped magnetic filament at the base of the explosion is a classic „sigmoid structure.“

Solar magnetic fields often assume this shape just before they explode. One study shows that sigmoid precursors are present in over 50% of CMEs.

Indeed, shortly after the explosion, a full-halo CME emerged from the blast site. Here it is.

The CME is expected to reach Earth on April 14th; a new NOAA model pinpoints its arrival time at 1100 UTC. The impact could spark a G2-class geomagnetic storm. 

Aurora alerts: SMS Text


April 12, 2022