Mauritius

In 1883, the eruption of the Indonesian volcano Krakatau was heard at Rodrigues.

An excerpt from the article 25 facts about Mauritius

Rodrigues remains the farthest point nearly 4800 kilometers away where the explosion was heard. The sound was described as “the roar of heavy guns.” Navy ships were ordered to investigate the incident, as it was feared that the sound was caused by cannons being fired by the threatened ship.

The noise caused by the eruption of the Krakatau volcano is described as the loudest sound in history.