Volcanic activity worldwide 21 Nov 2013: Nishino-shima
Thursday Nov 21, 2013 17:03 PM |
Surtseyan activity near Nishima-Shima Island where a new island was formed (Japanese Coast Guard via Blog Culture Volcan)Nishino-shima (Volcano Islands): (20 Nov) A new island was born today in the Pacific Ocean in Japan's Izu (or Volcano) island chain. It is produced by a new submarine eruption which is currently taking place about 500 m southeast of Nishino-Shima island.
The eruption was first spotted by Japanese navy this morning at 10:20 (local time) who documented surtseyan activity at the eruption site (explosive interaction of sea-water and lava, generating violent jets of steam and ash). It appears that the eruption has already built an island of about 200 m diameter in size, which suggests that the vent was already located in very shallow waters.
A small steam and ash plume rising to about 2000 ft (600 m) was reported by VAAC Tokyo. The last known eruption of the volcano occurred in 1973 .
Volcanic activity worldwide 20 Nov 2013: Fuego, Klyuchevskoy, Sinabung, Santa María / Santiaguito, ...
Wednesday, Nov 20, 2013
Etna (Sicily, Italy): (19 Nov) Weak explosive (sporadic small strombolian eruptions) and effusive activity (weakly alimented lava flow from eastern fissure vent) continues at a decreasing trend. There are interesting small surges of activity at rhythmic intervals of 3-4 hours (visible as the smaller peaks in the tremor signal). ... [more]
Tuesday, Nov 19, 2013
Monday, Nov 18, 2013
Etna (Sicily, Italy): Activity has gradually decreased since the last paroxysm, with short peaks of renewed stronger activity in between. As of now, weak explosions probably still continue at the New SE crater but cannot be observed due to cloud cover. Tremor signal is still elevated but with a an overall decreasing tendency. ... [more]
Sunday, Nov 17, 2013