solar activity

American  

noun

Astronomy.

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

---

Example Sentences

The research helps fill important gaps in the history of solar activity and improves scientists' understanding of dangerous space weather events.

From Science Daily • May 14, 2026

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

The mission made significant discoveries, including the first data that show the existence of a transient third radiation belt, which can form during times of intense solar activity, Nasa said.

From BBC • Mar. 10, 2026

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

From Science Daily • Mar. 9, 2026

That and the solar activity caused high temperatures in the capsule, and he had to return early.

From "Women in Space" by Karen Bush Gibson