![]() ![]() Nishinoshima grew about twelve times in area between 6 November 2013 and 11 October 2015, after nearly two years of constant eruptive activity (figure 39). Satellite thermal data (MODIS) also provides valuable information about the active heat flow at the volcano.Ĭhanges during November 2013-October 2015. Information comes primarily from monthly reports provided by the Japan Meteorological Agency (JMA) and reports and photographs taken by the Japan Coast Guard (JCG), which monitors the volcano due to its remote location in the Pacific Ocean, approximately 940 km S of Tokyo along the Izu-Bonin arc. Two major lobes of lava emerged from the central crater of the pyroclastic cone and flowed SW and W, expanding the size of the island to about 2.2 km in the E-W dimension and 1.9 km in the N-S dimension, a total area of about 3 km 2. A new eruption that included ash emissions and lava flows began in April 2017, and continued until mid-August 2017. Eruptive activity ended in November 2015, and no additional activity was observed during 2016. Between then and November 2015 the island grew from 0.29 to 2.63 km 2 as a result of numerous lava flows erupting from vents around a central pyroclastic cone (BGVN 41:09). Japan's Nishinoshima volcano erupted above sea level in November 2013 for the first time in 40 years. ![]() 25 m All times are local (unless otherwise noted) ![]()
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