Solar & space-weather phenomenon · Solar source

The Solar Cycle

The roughly eleven-year rise and fall of the Sun's activity, traced by the number of sunspots from solar minimum to solar maximum and back. Its underlying magnetic cycle takes about twenty-two years, as the Sun's polarity flips and returns. Activity — flares, CMEs, and storms — peaks near solar maximum.

Highlights

›The ~11-year heartbeat of solar activity

Across space weather

Sunspots

Knowledge connections

Associated withThe Sun
Associated withSunspots
Associated withSolar Flare
Associated withCoronal Mass Ejection (CME)
Associated withSunspots
Associated withThe Solar Dynamo
Associated withThe Butterfly Diagram
Associated withThe Maunder Minimum
Associated withThe Dalton Minimum
Associated withSolar Irradiance Variation

Sources

Facts on this topic will be cited from these primary and reference sources.

NOAA SWPCNOAA Space Weather Prediction Center
Space-weather forecasts and alerts: aurora (OVATION), the Kp index, and the G1–G5 geomagnetic storm scale.

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The Solar Cycle

Highlights

Drivers, environments & assets

Across space weather

Knowledge connections

Sources

The Solar Cycle

Highlights

Drivers, environments & assets

Across space weather

Knowledge connections

Sources