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A map of the effects of the 1883 Krakatoa volcanic eruption. The red line is the boundary of the collapsed area. Black numbers are sea depth before the eruption; red numbers are after. A line above a number means no ground found at that depth.

A map showing the results of the 1883 eruption of the Krakatoa volcano. Black numbers indicate sea depth before the eruption; red numbers are after.

Nine maps of the effects of the 1883 Krakatoa volcanic eruption, including on Rakata Island itself, and Calmeyer Island (formed by the eruption). Other maps use brown shading to show the flooding of nearby islands and settlements by ensuing tsunamis.

A map of the effects of the 1883 Krakatoa volcanic eruption. The orange line is the islands’ outline pre-eruption; the red line is the boundary of the collapsed area. Red numbers are sea depth. Pre- and post-eruption sizes of the islands are listed.

The Straits Settlements are in red, with the rest of the map marked with names of local peoples (‘Inhabited by the Johor Jakuns’) and resources (mines). Many areas are left blank or vague as unexplored or approximate. Inset map of Singapore city.

The Straits Settlements are in red, with the rest of the map marked with names of local peoples (‘Inhabited by the Johor Jakuns’) and resources (mines). Many areas are left blank or vague as unexplored or approximate. Inset map of Singapore city.

Map of East Asia, with British colonial possessions—Burma, Straits Settlements, Labuan and British North Borneo—highlighted with red borders. There is also an inset map of the Red River (Hong River) running through Hanoi, Vietnam.