Science ❯ Astronomy

Solar Activity

Solar Flares Geomagnetic Storms Coronal Mass Ejections Solar Storms Sunspots Auroras Solar Cycle Solar Maximum Solar Cycles Space Weather

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

Forecasters say a glancing CME could drive moderate geomagnetic activity with auroras reaching mid-latitudes.

Severe Geomagnetic Storm Pushes Auroras to Unusually Low Latitudes as Forecasts Flag Further CME Risk

Severe Solar Storm Ignites Auroras as Forecasters Track Third, Stronger CME

G4 Geomagnetic Storm Lights Up U.S. Skies as Third Solar Blast Nears

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

Extreme Geomagnetic Storm Forecast Wavers After CMEs Do Not Reach Earth on Friday

Strong Geomagnetic Storm Triggers Widespread Aurora With More Possible Tonight

Geomagnetic Storm Hits G3 as Earth‑Directed CME Approaches

Solar Activity Surges as Second X-Class Flare Hits Overnight

Aurora Watch: Minor Geomagnetic Storms Could Bring Northern Lights Tonight

NASA Image Shows ‘Jack‑O’-Lantern’ Sun as Earth Faces Minor Geomagnetic Storms

ESA Drill Maps Two-Phase Threat From Carrington-Scale Solar Storm

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

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

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

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

Earth Enters Coronal-Hole Solar Wind Earlier Than Forecast

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

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

Four-Day Geomagnetic Storm Ends as Forecasts Turn Quiet