Approximately how large was the Chicxulub impactor that caused the dinosaur extinction event?

Answer

About 10 kilometers (6 miles) across.

The Chicxulub impactor is historically significant as the object responsible for the extinction event that ended the age of the dinosaurs. Assessing the scale of such a catastrophic event reveals that the object itself was substantial, estimated to have been approximately 10 kilometers, or six miles, in diameter. An impact of this magnitude releases energy equivalent to billions of atomic bombs, initiating immediate devastating effects such as vaporizing the impact zone, lofting massive amounts of superheated rock ejecta globally, causing unprecedented seismic shocks, and generating mega-tsunamis sweeping across continents.

Approximately how large was the Chicxulub impactor that caused the dinosaur extinction event?

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