I'm guessing this is a mistake. I think they meant North Pacific Ocean. That is what the diagram shows.
IIRC the easternmost section of the Indian Ocean is a good deal west of the Korean Peninsula.One thing that just occurred to me is that if it hits *North* Korea with 170mph winds it will *destroy* the few signs of modern civilization they now have.If it's as bad as predicted this could be very,*very* bad.