Nishino-shima volcano (Volcano Islands, Japan) activity update
Tue, 4 Mar 2014, 11:3711:37 AM | BY: T
Part of Nishino-shima island with active flows on the southern shore, forming new bays and a small lake that once was a bay (Japan Coast guard)
Outlines of the new land on NIshino-shima island at various dates up to 28 Feb
View of Nishinoshima from the NW, showing the two cones around the vents
The island continues to grow as lava flows slowly spread into several directions. This is shown nicely by the latest aerial survey pictures the Japanese Coast guard took on 28 Feb. The most active flow fronts are currently at the southern shore while advance on the northern and eastern margins of the flow field has slowed down.
Aerial view of Nishinoshima on 28 Feb 2014 (Japan Coast Guard)
Two prominent cones have formed around the main vents, the smaller and younger of which still has strombolian activity as well, judging from the available photos.
One can note the closure of a small bay that had been formed in early Feb by lava flow tongues; eventually, the two flows touched and separated the bay from open water, turning it into a small lake. Several other small bays present now (or, on 28 Feb, at least) are in the process of forming and probably become lakes as well in the future. The discoloration of the enclosed water comes from dissolved gasses and fine material in suspension. The fate of these lakes will depend on the evolution of the lava flows. If new flows cover them, they might well disappear as well.
Fri, 21 Feb 2014, 13:38
The island continues to grow by progressing lava flows into several directions, as the latest images by the Japanese Coast Guard from 16 Feb show. Its highest peak, formed by the western of the 2 active vents, was measured at 66 m, i.e. it now reached almost twice the height of the peak of the old island. The new addition has more than doubled the size of the island so far. Read all