何が起きてるのか

what’s happening

→ 何
phrase Rare #34,973
what’s happening Often used as an embedded question, as in “I want to know what’s happening.” 起きてる is a conversational contraction of 起きている.
JA: 何が起きてるのか教えてください。
EN: Please tell me what’s happening.

彼は何が起きてるのか、分かってなかったんだ。

He had no idea what was going on.

ここで何が起きてるのか知りたいな。

I want to know what's going on here.

何が起きてるのかわかってる?

Do you know what's going on?