The real story
The climax came on the morning of 27 August 1883. On Rodrigues Island, about 4,800 km away, people thought they heard distant cannon fire. The pressure wave circled the planet several times and showed up on weather barometers from Jakarta to London.
The explosion itself was not the main killer: the collapse of the volcano sent tsunamis into the coasts of Java and Sumatra, and about 36,000 people died. Ash in the upper atmosphere gave the world strange red sunsets for months. In 1927 a new cone, Anak Krakatau, broke the surface, and in 2018 part of it collapsed and caused another deadly tsunami.