Nishino-shima volcano news & activity updates:
Nishino-Shima volcano (Izu Islands, Japan): island continues to grow
Wednesday Feb 05, 2014 11:12 AM | BY: TOMPFEIFFER
New images from an overflight on 3 February confirm that the activity on the former new island continues steadily. Over the past weeks, the vent has been feeding several active lava flow fronts, that enlarged the land covered by new lava in more or less all directions.
Nishino-Shima island on 3 Feb. For comparison, the previous shorelines on 20 Jan (yellow) and 21 Nov past year (white). (Image: Japanese Coast Guard)
In particular, there are two active flows relatively close to the vent which have been heading out towards the southeast and formed a small almost closed bay with green-orange discolored water inside. The water color is a result of dissolved volcanic gasses and lava fragments in suspension.
In addition to the ongoing lava effusion, strombolian explosions occur from the main vent as well, which has built a small perfectly circular cone.
Tuesday, Feb 04, 2014
The eruption on the now merged Nishino-Shima and Niishima islands continues. A hot spot is visible on current MODIS data. ... [more]
Sunday, Jan 26, 2014
The volcano continues to enlarge the island with lava flows, but seems to have increasingly explosive activity as well. Ash plumes to altitudes of 4,000 ft (1.2 km) were reported during the past days. These could have originated from more violent water-magma interaction (phreatomagmatic activity) or simply stronger strombolian explosions. ... [more]
Wednesday, Jan 15, 2014
The Japanese Coast Guard made an overflight yesterday and published the attached picture of the (former new) island. It seems that while it is still might be effusing some lava that form flows reaching the eastern shore in the bay near the vents, the rate of lava effusion/growth has slowed down. No large changes of the island appear visible when compared to the images a week ago. [more]
Monday, Jan 06, 2014
The new island that had "touched" Nishino-Shima has continued to grow and the two islands form now a coherent single one, with a interesting "butterfly" shape. This might of course change quickly again as well. There are now no traces left of the beach and the little colored lake that existed a week ago when the two islands started to merge. ... [more]
Friday, Dec 27, 2013
The recently born new Niijima island merged with the main island Nishino-Jima yesterday. Both are in fact two summits of the same volcanic edifice. Activity continues to enlarge the new land by lava flows and occasional strombolian explosions. ... [more]