"activity taking place" is correct and usable in written English.
You could use it to describe what is happening at a particular time or location. For example, "At the park there is a lot of activity taking place."
"You must do this at least 24 hours prior to any sexual activity taking place".
There is throughout, however, a feeling of the comic activity taking place within a larger, more somber frame.
On an otherwise quiet and dark block, we came upon a building with some unusual activity taking place inside.
BERLIN — The tension is palpable inside the Reichstag with a flurry of activity taking place in the Parliament.
"I don't think anybody in Baltimore thinks that criminal activity taking place in the port of Baltimore happened because there was 'The Wire,'" Mr. Scrosati said.
That could prove damaging for UK students here and to the huge amount of activity taking place overseas – particularly bad when universities are facing cuts to research budgets.
A tone of cautious optimism has crept into the flurry of diplomatic activity taking place in the shadows ahead of the Iran nuclear talks in Baghdad on Wednesday.
The explosion in online innovation throughout public services is seeing more and more activity taking place on the net, whether via interactive websites, or mobile applications.
A spokeswoman for Honeywell said: "Honeywell considers copyright infringement a very serious matter and has rigorous policies intended to prevent activity taking place on its premises.
Graham Snape, UKTI international trade sector adviser: Although India looks to be incredibly poor, there is economic activity taking place and they [consumers] have aspirations.
Nonetheless, with activity taking place all over the country, the business needs to ensure that it stays consistent and retains its high standards.
