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

We’re in a period of increased solar activity, and there was another big show last Thursday night, with aurora borealis visible as far south as Texas, San Diego, and Mazatlan.

From Slate

More sightings of the Northern Lights are possible in the next few nights - cloud permitting - as solar activity remains relatively high.

From BBC

When solar activity is strong, this can expand to cover a greater area - which explains why displays can be occasionally seen as far south as the UK.

From BBC

With enhanced solar activity continuing, there will be more chances to see the aurora over the coming months.

From BBC

Solar activity increased throughout Monday afternoon with a "strong G3 geomagnetic storm" being observed, meaning it was likely that the Northern lights would be visible across the UK with the naked eye, overnight.

From BBC