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Sunspots

Solar Flares Coronal Mass Ejections Active Regions X-class Flares Solar Cycles Solar Cycle Geomagnetic Storms Magnetic Fields Historical Events Historical Observations AR4274 Group 4246 Active Region 4455 Sunspot Regions AR3842 Anti-Hale Sunspots Technology Impact Impact on Earth Region 4274 AR3664 Solar Maximum Sunspot Region 4087 AR 4366 Sunspot AR 3664 Sunspot AR3664 AR4366 Earth Impacts Hyperactive Sunspot Solar Flare Classification AR4294 AR4087

Cannibal Solar Storm From Sunspot 4455 Set to Reach Earth

NOAA has issued a G3 alert warning that the merged CME could widen auroral displays with short-lived radio disruption, increased satellite drag.

Sunspot AR4366 Hurls X-Class Flares as CME Is Forecast to Brush Earth Thursday

NOAA Issues G2 Geomagnetic Storm Watch as Giant Sunspot Cluster Faces Earth

X1.2 Solar Flare from AR4114 Disrupts Pacific Radio Communications