Science ❯ Astronomy ❯ Solar Activity

Coronal Mass Ejections

Geomagnetic Storms Solar Flares Auroras Impact on Earth Effects on Earth Aurora Borealis Northern Lights Geomagnetic Effects Space Weather Full-halo CMEs Effects on Technology Cannibal CME Solar Radiation Storms Earth-Directed CMEs Cannibal Coronal Mass Ejection Radiation Storms Solar Maximum Partial-Halo CME Coronal Holes Forecasting Effects X-class Flares

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

Forecasters expect a glancing CME to bring minor geomagnetic storm conditions.

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

Strong Geomagnetic Storm Triggers Widespread Aurora With More Possible Tonight

Geomagnetic Storm Hits G3 as Earth‑Directed CME Approaches

Northern Lights Possible Across Northern U.S. Tonight as NOAA Issues G1–G2 Storm Watch

NOAA: G1 Geomagnetic Storm Could Bring Northern Lights to 12 U.S. States

NOAA Forecasts Geomagnetic Storm Peaking Today, Northern Lights Visible in 14 States and Canada

X1.2 Solar Flare from AR4114 Disrupts Pacific Radio Communications