The Sunda Strait is the strait between the Indonesian islands of Java and Sumatra. It connects the Java Sea to the Indian Ocean. The name comes from the Indonesian term Pasundan, meaning "West Java". It also comes from the name of the Sundanese people, the native people of West Java, with the Javanese people being found mostly in Central and East Java.

The 1883 eruption of Krakatoa in the Dutch East Indies (now Indonesia) began in the afternoon of August 26, 1883 (with origins as early as May of that year), and culminated with several destructive eruptions of the remaining caldera. On August 27, two-thirds of Krakatoa collapsed in a chain of titanic explosions, destroying most of the island and its surrounding archipelago. Additional alleged seismic activity continued to be reported until February 1884, though reports of those after October 1883 were later dismissed by Rogier Verbeek's investigation. It was one of the deadliest and most destructive volcanic events in recorded history, with at least 36,000 deaths being attributed to the eruption itself and the tsunamis it created. Significant additional effects were also felt around the world.

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