Science ❯ Astronomy ❯ Solar Phenomena

Solar Flares

Coronal Mass Ejections Geomagnetic Storms Impact on Earth X-Class Flares Classification of Solar Flares Auroras Effects on Earth X-class Solar Flares Aurora Borealis Northern Lights

Sun Erupts With Two X-Class Flares, Triggering Shortwave Radio Blackouts

Space-weather agencies are watching for a possible coronal mass ejection in the next few days.

Late CME Arrival Lowers Aurora Forecast to G1–G2 Tonight

NOAA Issues Geomagnetic Storm Watch as Aurora Chances Rise Near U.S.–Canada Border

New X4.2 Solar Flare Erupts From AR4366 as Earlier CME Nears Earth

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

Japan Records Geomagnetic Storm Linked to X‑Class Solar Flare

Overnight Geomagnetic Storm Pushes Auroras to 50° North

Earth-Directed CME From Dec. 31 M7.1 Flare Forecast To Bring Geomagnetic Storm Tonight

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

Sun Erupts With X1.9 Flare as Largest 2025 Sunspot Complex Emerges

Sun Unleashes Three M-Class Flares as Activity Surges

Aurora Forecast Points to Minor Geomagnetic Storm and Northern U.S. Views Tonight

NOAA Issues Strong Geomagnetic Storm Watches as CMEs Near Earth, Raising Aurora Odds

Kamchatka Logs Nine Aftershocks Up to M5.8 as Pacific Rim Sees Fresh Quakes

Solar Activity Surges as Second X-Class Flare Hits Overnight

M1.1 Solar Flare Recorded Over Sunspot 4248 as Overall Activity Eases

Earth Enters Fast Solar-Wind Stream as Moderate Geomagnetic Storm Begins

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

Earth Enters Coronal-Hole Solar Wind Earlier Than Forecast

M2.0 Solar Flare Recorded on Oct. 9 as Scientists Keep Watch