solar activity

noun

Astronomy.

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

Example Sentences

Heighted solar activity could lead to the Northern Lights being visible further south than usual, with sightings possible with the naked eye.

From BBC

By Wednesday night no significant solar activity is currently expected, meaning less chance of seeing the Northern Lights.

From BBC

This is important because intense solar activity can affect satellite communication and knock out power grids on Earth.

From BBC

These storms, caused by solar activity, are best known for producing the aurora borealis - the Northern Lights - which have been seen in Wales several times recently.

From BBC

While solar activity remains elevated, there is a chance of seeing the Northern Lights again tonight, mostly in the north of the UK.

From BBC