Volcanic update: Eruption Alert Warning increased for Kirishimayama and Ash Eruption at Suwanosejima (Japan)

Two new volcanoes are showing signs of volcanic unrest after the M6.0 earthquake that hit the Ryukyu Islands, Japan on May 9, 2017.

The JMA has increased the eruption alert warning for Kirishimayama from 1 to 2 on May 9, 2017 and a volcanic ash advisory was issued for Suwanosejima on May 10, 2017.

The JMA has increased the eruption warning level of the Kirishimayama / Ebino Highland to level 2 on 9 May, 2017.

The resulting inspection report – 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.

volcanic activity Kirisimayama Ebino plateau, enhanced volcanic activity Kirisimayama Ebino plateau, two volcanoes erupt after M6.0 earthquake in Japan
A new fumarole has formed on the Kirishimayama / Ebino Highland. via Tokyo

A pit (a well) from which fumaroles has been ejected has formed since the last study on April 22.

The amount of ejected material – volcanic ash – found around the fumarole coincides perfectly with the estimated size of the new hole.

volcanic activity Kirisimayama Ebino plateau, enhanced volcanic activity Kirisimayama Ebino plateau, two volcanoes erupt after M6.0 earthquake in Japan
Map of Japanese volcanoes and their respective alert warning. via JMA

Meanwhile, a volcanic ash advisory was issued on May 10, 2017 at 14:17 by the VAAC Tokyo for Suwanosejima.

eruption Suwanosejima
via GIS

The Suwanosejima volcano is situated in the northern Ryukyu islands and has two summit craters. The Otake crater collapsed at the end of its eruption in 1813-14 and resulted in the horseshoe-shaped Sakuchi caldera, which had an intermittent strombolian activity between 1949 and 1996.

Were these volcanic eruptions triggered by the M6.0 earthquake in the Ryukyu islands on May 9, 2017?

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