The 1883 Krakatoa eruption produced what is often called the loudest sound in recorded history. How far away was it still heard as a boom?

The answer

People on Rodrigues Island, about 4,800 km (3,000 miles) away, mistook the blasts for distant naval cannon fire. The pressure wave circled the globe multiple times. Barometers everywhere twitched as it passed.

Correct answer: About 4,800 km (3,000 miles)