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Random pictures | |  Nishinoshima volcano (西之島, Nishi-no-shima meaning literally: Western Island, also: Rosario Island) is the tiny submerged part of a caldera in the northern Volcano Islands of Japan. The small 700 m wide island was significantly enlarged during the last eruption in 1974, which joined several new islands that formed then.
Water discoloration due to possible minor eruptions and / or shallow submarine hydrothermal activity in the area is a frequent sight.
The mostly submerged volcano is a massive seamount with prominent flank cones on the south, west and NE flanks. The southern cone rises to a depth of 214 m below the sea surface, 9 km SSE of Nishinoshima. caldera, submarine volcano approx 70 m / 215 ft (currently growing) Volcano Islands, Japan, 27.27°N / 140.88°E Current status: restless (2 out of 5)
Nishino-shima webcams / live data | ReportsNishino-shima volcano booksNishino-shima volcano eruptions:2017, 2013-15, 1985(?), 1982(?), 1980(?), 1978(?), 1975(?), 1973-74 Typical eruption style:explosive Last earthquakes nearbyLatest satellite images  Nishino-shima volcano news & activity updates:Nishino-shima volcano (Japan): eruption continues, approaches 2 year anniversarySaturday Nov 21, 2015 06:32 AM | BY: T  Explosion from Nishinoshima's active main vent on 17 Nov (Japan Coast Guard) The volcano continues to erupt and is approaching its anniversary. It started with the birth of a new island offshore the old Nishino-Shima island on 23 Nov 2013, which by now has joined and completely covered and greatly enlarged the older one.
The latest survey of the Japanese Coast Guard on 17 Nov showed that although lava effusion continues at slow rate, thickening the flow field in the interior of the island, they no longer reach the shores and the island's total surface has decreased a bit due to wave erosion from 2.67 in September to now 2.63 square km.
Strombolian to vulcanian-type explosions occur from the main vent, sometimes strong enough to project bombs of meter size into the sea, i.e. to more than 1 km distance.
Previous newsWednesday, Oct 21, 2015 The eruption that had started in Nov 2013 still continues with no significant changes. During the most recent survey on 18 Oct by the Japanese Coast guard, strombolian activity was observed at the central vent, but lava flows no longer reached the coast of the young island, which is being affected and modified by wave erosion. ... [more]Saturday, Aug 08, 2015 The volcano on the island continues to erupt lava flows that continue to gradually enlarge the island. ... [more]
Tuesday, Jun 23, 2015 The eruption on the island continues with apparently relatively steady lava effusion that feeds active flows reaching and enlarging the SE corner of the island, which has now 2.7 square kilometer of surface. ... [more] Tuesday, Mar 03, 2015 The eruption continued at least through 27 February. ... [more]Monday, Jan 19, 2015 The island continues to grow with lava flows, which recently have been mostly active towards the east from the main vent, while most growth during Nov-Dec had been towards the north, where a vast plateau has been built. ...
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