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Sunspots

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

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

Forecasters say the magnetically complex region remains volatile with an elevated risk of further strong flares.

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

X1.2 Solar Flare from AR4114 Disrupts Pacific Radio Communications