2 spots left on Iceland Geo Tour 16-30 July 2022

Oshima volcano

Updated: Jul 3, 2022 03:08 GMT - Refresh
stratovolcano 764 m / 2,507 ft
Izu Islands, Japan, 34.72°N / 139.4°E
Current status: normal or dormant (1 out of 5)

Izu-Oshima volcano, 伊豆大島 Izu-ōshima) is the northernmost of the Izu islands of Japan, and one of the world's most active volcanoes. It is a mostly submerged stratovolcano that forms an 11 x 13 km island.
Oshima erupts very frequently, on average every 1-3 years, but has been quiet since 1990, which is an unusual long interval compared to its activity in historic times.
Eruptions at Oshima volcano occur from both summit and flank vents and its lavas are relatively fluid. The eruptions often produce lava fountains, strombolian activity, lava flows and the formation of lava lakes.

Show interactive Map
[hide map] [enlarge]
Typical eruption style: strombolian, effusive
Oshima volcano eruptions: 1990, 1987-88, 1986, 1974, 1971, 1970, 1970, 1969, 1968, 1968, 1967, 1965-66, 1962-65, 1961(?), 1959-60, 1959, 1958, 1957, 1956, 1956(?), 1953-54, 1950-51, 1940, 1939, 1939, 1938, 1937, 1935, 1934, 1934(?), 1933, 1928, 1922-23, 1920(?), 1919, 1915, 1914, 1912-13, 1910, 1876-77, 1870, 1868?, 1846, 1837-38, 1827, 1822-24, 1803, 1792, 1789, 1783-86, 1777-79, 1695, 1684-90, 1636-38, 1612-13, 1600-01, 1588, 1552, 1527, 1442, 1421, 1416, 1415, 1338, 1267, 1112, 936, 886, 854(?), 751, 684(?), 681(?), 680(?), 654, 630, 605
Lastest nearby earthquakes: No recent earthquakes


from Smithsonian / GVP volcano information:
Oshima volcano in Sagami Bay, east of the Izu Peninsula, is the northernmost of the Izu Islands. The broad, low stratovolcano forms an 11 x 13 km island and was constructed over the remnants of three dissected stratovolcanoes.
It is capped by a 4-km-wide caldera with a central cone, Mihara-yama, that has been the site of numerous historical eruptions. More than 40 parasitic cones are located within the caldera and along two parallel rift zones trending NNW-SSE. Although Oshima is a dominantly basaltic volcano, strong explosive activity has occurred at intervals of 100-150 years throughout the past few thousand years. Historical activity at Oshima dates back to the 7th century AD.

Oshima Photos

View of Sakurajima from Kagoshima city (Photo: Ivana Dorn)
View of Sakurajima from Kagoshima city (Photo: Ivana Dorn)
Small ash puff on the afternoon of 19 July, seen from Kagoshima Bay. (Photo: Tom Pfeiffer)
Small ash puff on the afternoon of 19 July, seen from Kagoshima Bay. (Photo: Tom Pfeiffer)

1968 eruption & lava fountains
A major eruption from Izu-Oshima volcano in 1986 produced spectacular lava fountains up to 1600 m height and a 16-km-high subplinian eruption column. More than 12,000 persons were evacuated from the island.
Tall lava fountains:
The 1968 Oshima lava fountain is the second highest ever (photographically) recorded lava fountain from a volcano. The highest is the 1500-2000 m tall lava fountain from the Voragine on Etna volcano on 4 September 1999, the third the 1000-1200 m tall lava fountain from Etna's SE crater during the paroxysm on 23 May 2000.
For comparison, the tallest lava fountains observed on Hawaii were about 590 m tall from Kilauea Iki on 21 November 1959. The specacular lava fountains from Pu'u O'o during 1983-85 reached up to 500 m.

See also: Sentinel hub | Landsat 8 | NASA FIRMS
Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

More on VolcanoDiscovery

Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.
Home | Travel | Destinations | Volcanoes | Photos | Earthquakes | About | Glossary | News | Contact | Privacy | Imprint | EN | DE | EL | ES | FR | IT | RU
Follow us:Follow us on facebookFollow us on InstagramFollow us on TwitterVisit our Youtube channel