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Sunspots

Solar Flares Geomagnetic Storms Coronal Mass Ejections AR4366 Auroras Active Sunspot Region 3664 AR3697 Historical Observations Solar Storms Magnetic Field Strength

Giant Sunspot AR4366 Keeps Firing Powerful Flares as Forecasters Watch for CME Threat

Recent X-class blasts disrupted radio service in parts of West Africa and southern Europe.

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

Giant Sunspot Complex Rotates Toward Earth as Forecasters Watch for Eruptions

Geomagnetic Storm Hits G3 as Earth‑Directed CME Approaches

Solar Flares Intensify With M4.8 Blast, X‑Class Possible Today

Severe Solar Storms Trigger Stunning Northern Lights Across U.S.

NASA Observes Twin X-Class Solar Flares

Geomagnetic Storm to Illuminate Skies as Far South as New York

Kepler's 1607 Sunspot Drawings Illuminate Solar Cycle Mysteries

Scientists Detect Early Signs of Solar Cycle 26

Intense Solar Activity Promises More Northern Lights

Sunspot AR3664 Returns, Potential for More Powerful Solar Storms

Solar Orbiter Pinpoints Origins of Slow Solar Wind

NASA Observes Unprecedented Quadruple Solar Flare Event