Fetching details from the dictionary...

to become quiet; to quiet down; to quieten down
to calm down; to die down; to subside; to abate; to be suppressed
騒いでいた子供たちがようやく静まった。
The noisy children finally quieted down.
嵐が去って海がようやく静まってきた。
The sea has finally calmed down after the storm passed.
会場が静まり、講演者が話し始めた。
The venue quieted down and the speaker began to talk.