Table 2 Volcanic island and submarine volcano pumice sources used in this study. Descriptions are based on Ossaka (1991)
Name | Code | Abbrev. | Latitude, longitude | Years in which pumice rafts were produced |
|---|---|---|---|---|
Submarine volcano NNE of Iriomote Island | V1 | IR | 24.5°N, 123.8°E | 1924 |
Izu-Tobu Volcanoes | V2 | IZ | 35.0°N, 139.1°N | 1989 |
Miyakejima | V3 | MI | 34.1°N, 139.5°E | 1983 |
Bayonnaise Rocks | V4 | BA | 31.9°N, 140.0°E | 1952–1953, 1970 |
Nishinoshima | V5 | NI | 27.2°N, 140.9°E | 1973–1974 |
Kaitoku Seamount | V6 | KA | 26.1°N, 141.1°E | 1981 |
Fukutoku-Oka-no-Ba | V7 | FU | 24.3°N, 141.5°E | 1917, 1986, 2021 |