Tier of a Specific Asteroid

[Niarobi_(Formerly_Hadou)]

I was reading Inuyashiki and there is an Asteroid relevant in the storyline that is supposed to drive the Earth into extinction.

It states that the asteroid is over 30 miles across, roughly the size of Rhode Island, and it also mentions that it is roughly five times larger than the asteroid that struck the Yucatan Peninsula around 75 million years ago. Can someone calculate both of these asteroids potency for me?

 

[WeeklyBattles]

The Chicxulub Impact Event is High 6-B, so this asteroid youre describing being 5x larger would still have it be High 6-B, maybe low-end 6-A

 

[RadianceQ]

Earth Impact Calculator puts it at minimum 5.35*10^24 J. Continent level (6-A)

 

[Niarobi_(Formerly_Hadou)]

Thank you. :3