Nishino-Shima volcano (Izu Islands, Japan): island continues to grow
Mi, 5. Feb 2014, 11:1211:12 AM | VON: 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.
Di, 4. Feb 2014, 12:36
The eruption on the now merged Nishino-Shima and Niishima islands continues. A hot spot is visible on current MODIS data. Read all
So, 26. Jan 2014, 11:52
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. Read all