Two new islands have appeared off Anak Krakatoa, potentially the first in nearly a century to emerge within the caldera left by Krakatoa’s catastrophic 1883 eruption. The formations, discovered following a 25-hour eruption in early September, sit hundreds of metres off opposite sides of Anak Krakatoa – one to the northwest and the other to the southeast – almost on a straight line through the volcano’s crater, according to Indonesia’s Geological Agency. The agency places one about 760 metres...