Iriomote Submarine Volcano
Submarine Volcano NNE of Iriomotejima
Stratovolcano · Japan · 200m (submarine)
- Type
- Stratovolcano
- Country
- Japan
- Region
- Western Pacific Volcanic Regions / Ryukyu Volcanic Arc
- Elevation
- 200m (submarine)
- Coordinates
- 24.570, 123.930
- Last eruption
- 1924
- Tectonic setting
- Subduction zone / Oceanic crust (< 15 km)
- Landform
- Composite
- Major rock type
- Rhyolite
Geological summary
The southernmost Ryukyu Islands volcano is a shallow submarine volcano 20 km NNE of Iriomotejima island and 35 km WSW of the northern tip of the island of Ishigakishima in an area with an estimated depth of 200-300 m. A major submarine eruption on 31 October 1924 produced rhyolitic pumice rafts with an estimated volume of about 1 km3 that were carried by currents along both coasts of Japan as far north as Hokkaido. The largest pumice blocks exceeded 1 x 2 m in size, and the volume of ejecta places this poorly known eruption among the largest recorded in Japan.
From Wikipedia
The Iriomote submarine volcano is an active submarine volcano located 20 km (12 mi) north of Iriomote Island, Japan. The volcano is also known as the Submarine Volcano NNE of Iriomotejima. Its only reported eruption occurred on October 31, 1924—measuring a Volcanic explosivity index (VEI) of 5, it is one of the largest historical eruptions in Japan. However, scientific knowledge about the eruption is sparse.
Wikipedia · CC BY-SA · Read full article →
Eruption history
Detailed timeline
- 1924VEI 4Observed1924-10-31 – Ongoing
External links
⚠ For reference only. Not for emergency response.