Volcanodle
Puzzle #61 was Kozushima.
A cluster of rhyolitic lava domes and associated pyroclastic deposits form the 4 x 6 km island of Kozushima in the northern Izu Islands. The island is the exposed summit of a larger submarine edifice more than 20 km long that lies along the Zenisu Ridge, one of several en-echelon ridges oriented NE-SW, transverse to the trend of the northern Izu arc. The youngest and largest of the 18 lava domes, Tenjosan, occupies the central portion of the island.
Read about it at the Global Volcanism Program →
Global Volcanism Program, Smithsonian Institution
What the record says
Puzzle 61 ran on 8 Sep 2026 and the answer was Kozushima, played with 6 guesses against 8 columns. On the record: Country - Japan; Region - Northwestern Pacific Volcanic Regions; Type - lava-dome; Tectonic setting - subduction; Elevation - 500-1500; Last eruption - older-Holocene; Rock type - rhyolite; Historically observed - observed.
Beyond the grid the record adds Largest recorded eruption - VEI 4; Holocene eruptions recorded - 5 eruptions.
Volcanodle builds its record from Global Volcanism Program, Smithsonian Institution (Venzke, E. (ed.), Volcanoes of the World, volcano.si.edu). The description above comes from the same place the game credits on every reveal: A verbatim excerpt of the volcano's GVP Geological Summary. The puzzle itself is still playable in the archive, and every answer that has been and gone is listed on the past-answers page.
How it scored
- Country
- Japan
- Region
- Northwestern Pacific Volcanic Regions
- Type
- lava-dome
- Tectonic setting
- subduction
- Elevation
- 500-1500
- Last eruption
- older-Holocene
- Rock type
- rhyolite
- Historically observed
- observed
Also on the record
- Largest recorded eruption
- VEI 4
- Holocene eruptions recorded
- 5 eruptions