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A aerial views shows the pacific island of Nishinoshima, also known as Rosario Island, where researchers started surveillance activities for the first time since its eruption in 2013, some 1,000 kilometers south of Tokyo, Japan October 20, 2016. Until 1973, the rocky outcrop was barely 650 metres long and 200 metres wide, and had experienced little volcanic activity, researchers say. But a spectacular eruption nearby in November 2013 spewed out ash and rock for two years, creating an island spanning 2.68 square kilometres, bigger than the city-state of Monaco in Southern France. (Photo by Reuters/Kyodo News)
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