Photo: Spaarnestad
Since 1927 the Volcano Guard Service (Vulkaan Bewakingsdienst) of the Dutch East Indies had been monitoring the birth of a new mountain from the bottom of the Sunda Strait. They sent an employee of the colonial government, a volcanologist from Russia, W. A. Petroeschevsky to build an observation post at Panjang Island.
Early knowledge of this volcano was after fishermen reported the emergence of air bubbles from the sea surface. This made fishermen afraid to go to sea and avoided the area where bubbles appeared.
In 1928 the new mountain actually emerged from sea level, Mr. Petroeschevsky later gave the new mountain a name; Mount Anak Krakatau or the Child of Krakatoa.
Mount Anak Krakatau continues to be active until now and has expanded to form its own island.