Volcanodle
Puzzle #109 was Numazawa.
Numazawa is a small, 2-km-wide dominantly dacitic-to-rhyolitic caldera constructed within an older Pliocene caldera. Eruptions of the 110,00 years before present (BP) rhyolitic Shibahara pyroclastic-fall deposit and the 71,000 BP dacitic Mukuresawa lava dome were followed by the dacitic plinian Mizunuma eruption about 45,000 BP, emplacement of the Sozan lava dome at 43,000 BP and the Sozan lava dome at about 20,000 BP.
Read about it at the Global Volcanism Program →
Global Volcanism Program, Smithsonian Institution
What the record says
Puzzle 109 ran on 26 Oct 2026 and the answer was Numazawa, played with 6 guesses against 8 columns. On the record: Country - Japan; Region - Northwestern Pacific Volcanic Regions; Type - shield; Tectonic setting - subduction; Elevation - 500-1500; Last eruption - older-Holocene; Rock type - dacite; Historically observed - observed.
Beyond the grid the record adds Largest recorded eruption - VEI 5; Holocene eruptions recorded - 1 eruption.
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
- shield
- Tectonic setting
- subduction
- Elevation
- 500-1500
- Last eruption
- older-Holocene
- Rock type
- dacite
- Historically observed
- observed
Also on the record
- Largest recorded eruption
- VEI 5
- Holocene eruptions recorded
- 1 eruption