Report on Kuchinoerabujima (Japan) — 12 June-18 June 2019
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 12 June-18 June 2019
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2019. Report on Kuchinoerabujima (Japan). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 12 June-18 June 2019. Smithsonian Institution and US Geological Survey.
30.443°N, 130.217°E; summit elev. 657 m
All times are local (unless otherwise noted)
JMA reported that Kuchinoerabujima’s Shindake Crater has not erupted since 3 February, and the number of shallow earthquakes located near the crater had been decreasing since then. Deeper volcanic earthquakes had not been recorded since 16 May. Sulfur dioxide emissions remained elevated. JMA lowered the Alert Level to 2 (the second lowest level on a scale of 1-5) on 12 June.
Geologic Background. A group of young stratovolcanoes forms the eastern end of the irregularly shaped island of Kuchinoerabujima in the northern Ryukyu Islands, 15 km W of Yakushima. The Furudake, Shindake, and Noikeyama cones were erupted from south to north, respectively, forming a composite cone with multiple craters. The youngest cone, centrally-located Shindake, formed after the NW side of Furudake was breached by an explosion. All historical eruptions have occurred from Shindake, although a lava flow from the S flank of Furudake that reached the coast has a very fresh morphology. Frequent explosive eruptions have taken place from Shindake since 1840; the largest of these was in December 1933. Several villages on the 4 x 12 km island are located within a few kilometers of the active crater and have suffered damage from eruptions.