Fumerollian hole on the Iwozan crater of the Kirisimayama / Ebino plateau. - photo report eri.u-tokyo from 11.05.2017
The JMA increased the eruption warning level of the Kirishimayama / Ebino Highland to level 2 on 9 May 2017.
The inspection report carried out from 5 to 10 May (published on 11.05.2017) confirms the existence of new fumaroles accompanied by sediment and sand jets at the southwestern limit of the Iwozan crater of Kirisimayama / Ebino plateau .
A pit (a well) from which fumaroles were released was not present during a study on April 22; Its date of appearance is therefore between 22.04 and 05.05.2017.
The amount of ejected material accumulated around the fumarole coincides practically with the estimated size of the hole. The upper layer of the ejecta is a volcanic ash of white silt seems to be caused first by the expansion of fumaroles and then by the spraying of hot muddy water. The distribution of volcanic ash to the southwest seems to be caused by the diffusion of splashes of hot muddy water in strong winds.
Source : University Tokyo - link
Kirishimajama - map of volcanic ash discharges discharged through the fumarole hole A on the SW edge of the Iwan crater - Doc. Report eri.u-tokyo of 11.05.2017
Volcanic alert level 2 for Kirishimayama / Ebino (on Kyushu Island) and Suwanosejima (in the Ryukyu archipelago) on 09.05.2017 - Map of JMA / volcanic warning Kyushu
A volcanic ash advisory was issued on May 10, 2017 at 14:17 by the VAAC Tokyo for Suwanosejima.
The volcano is on alert level 2 / not approaching the crater.
The Suwanosejima, in the northern Ryukyu islands, is an andesitic stratovolcano with two summit craters. The Otake crater collapsed at the end of its eruption in 1813-14 to form the Sakuchi caldera in a horseshoe shape and a large avalanche of debris. It had an intermittent strombolian activity between 1949 and 1996, after which periods of inactivity prolonged.
- VAAC Tokyo - 10.05.2017
- Global volcanism Program - Suwanosejima