© JAPAN COAST GUARDImage of Nishinoshima taken by the Japan Coast Guard on June 29.
A volcanic island in the Pacific Ocean appears to be experiencing a "vigorous growth spurt," with images from space showing it expanding in size since the middle of June.
The island, Nishinoshima, is located about 600 miles south of Tokyo, Japan.
While it first emerged from the sea in the 1970s, it started growing in 2013 following an eruption of an underwater volcano. Initially, another volcanic island was formed around 1,600 feet from Nishinoshima, but in 2014 satellite images showed the two had joined together to form one landmass.
Scientists thought the second island would disintegrate with time. However, the island continued to grow and in the last month, more volcanic eruptions have led it to increase in size even further.
Images from a NASA satellite taken on July 4 showed heat signatures from erupting lava. Aerial photographs from Japan's Coast Guard also show how volcanic activity appears to have started up in May, with more ash and lava being produced than had been over previous months.
Comment: Japanese volcanic island grows 12 times in size since forming in 2013