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solar activity

American

noun

Astronomy.

the sum of all variable and short-lived disturbances on the sun, as sunspots, prominences, and solar flares.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

With the peak in the solar cycle, they will also be keeping an eye on solar activity and enhanced radiation which could affect the astronauts.

From BBC • Mar. 30, 2026

These influences include El Niño events, volcanic eruptions, and variations in solar activity.

From Science Daily • Mar. 9, 2026

Today, numerous satellites monitor the Sun, measuring the solar wind and the energy it emits, giving us a better understanding of solar activity and earlier warnings when it increases.

From BBC • Dec. 28, 2025

Spectacular displays of auroras at abnormally low latitudes were expected again Wednesday night into Thursday, a result of intense solar activity which also carries risks to communication networks.

From Barron's • Nov. 13, 2025

His launch had been delayed due to various technical problems and high solar activity.

From "Women in Space" by Karen Bush Gibson

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023