Adatarayama
Northeast Japan Volcanic Arc, Japan. This page separates the permanent volcano catalogue, historical eruption records, and selective weekly activity reports.
- Coordinates
- 37.65° N, 140.28° E
- Elevation
- 1,728 m
- Last recorded eruption
- 1996 CE
- Historical eruption records
- 13
- Primary type
- Stratovolcano(es)
- Evidence
- Eruption Observed
- GVP database
- 5.4.0
- Catalogue revision
- Revision 2
Volcano profile
- Volcanic landform
- Composite
- Tectonic setting
- Subduction zone / Continental crust (> 25 km)
- Geologic epoch
- Holocene
- Major rock type
- Andesite / Basaltic Andesite
- Region
- Northwestern Pacific Volcanic Regions
- Subregion
- Northeast Japan Volcanic Arc
Geological summary
The broad forested massif of Adatarayama volcano is located E of Bandai volcano, about 15 km SW of Fukushima city. It consists of a group of dominantly andesitic stratovolcanoes and lava domes that rise above Tertiary rocks on the south and abut Azumayama volcano on the north. Construction took place in three main stages that began about 550,000, 350,000, and 200,000 years ago. The high point of the complex is 1728-m-high Minowasan, a dome-shaped stratovolcano north of Tetsuzan, the currently active stratovolcano. Numanotaira, the active summit crater, is surrounded by hot springs and fumaroles and is breached by the Iogawa river ("Sulfur River") on the west. Seventy-two workers of a sulfur mine in the summit crater were killed during an eruption in 1900. Historical eruptions have been restricted to the 1.2-km-wide, 350-m-deep Numonotaira crater.
Separate activity dataset
Weekly volcanic activity reports
Smithsonian/USGS weekly reports are selective and preliminary. They are not a comprehensive list of all eruptions or volcanic activity.
No weekly report appears on this page. Absence from the weekly report does not establish an absence of volcanic activity.
Historical catalogue records
Eruption history
Dates can be approximate, incomplete, or BCE. These are historical catalogue observations, not a statement about present activity.
| Start | End | Activity | Confirmation | VEI | Evidence | Record |
|---|---|---|---|---|---|---|
| 1996-09-01 CE | 1996-09-01 CE | Confirmed EruptionNumanotaira | Confirmed | 1 | Observations: Reported | GVP 17913Database 5.4.0 |
| 1900-07-17 CE | 1900-07-17 CE | Confirmed EruptionNumanotaira | Confirmed | 2 | Observations: Reported | GVP 17912Database 5.4.0 |
| 1899-08-24 CE | 1899-11-12 CE | Confirmed EruptionNumanotaira | Confirmed | 2 | Observations: Reported | GVP 17911Database 5.4.0 |
| 1813-01-10 CE | Not supplied | Uncertain EruptionNumanotaira | Uncertain | ?1 | Not supplied | GVP 17910Database 5.4.0 |
| 950 ±50 years CE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | Not supplied | Correlation: Tephrochronology | GVP 17909Database 5.4.0 |
| 51 ±900 years BCE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | Not supplied | Correlation: Tephrochronology | GVP 17908Database 5.4.0 |
| 591 ±200 years BCE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | 3 | Isotopic: 14C (calibrated) | GVP 17907Database 5.4.0 |
| 1551 ±1100 years BCE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | Not supplied | Correlation: Tephrochronology | GVP 17906Database 5.4.0 |
| 2601 ±50 years BCE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | 3 | Isotopic: 14C (calibrated) | GVP 17905Database 5.4.0 |
| 4301 ±850 years BCE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | 3 | Correlation: Tephrochronology | GVP 17904Database 5.4.0 |
| 6151 ±100 years BCE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | 3 | Isotopic: 14C (calibrated) | GVP 17903Database 5.4.0 |
| 6651 ±100 years BCE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | 3 | Isotopic: 14C (calibrated) | GVP 17902Database 5.4.0 |
| ? 8051 BCE | Not supplied | Confirmed EruptionNumanotaira | Confirmed | 3 | Correlation: Tephrochronology | GVP 17901Database 5.4.0 |
Source and attribution
Source: Data: Smithsonian Institution Global Volcanism Program, Volcanoes of the World.
View the original Smithsonian GVP recordGlobal Volcanism Program, 2026. Volcanoes of the World 5.4.0.
The GVP database is scientific documentation that changes as evidence is reviewed. Historical dates may be approximate or uncertain. This platform is not an official emergency-warning service.
Read the GVP terms of useData freshness
- Source updated
- Not supplied
- Retrieved
- 11 Oct 2026, 13:07 UTC
- GVP database version
- 5.4.0
- Catalogue revision
- 2
Source-update and retrieval times describe this catalogue record. Each weekly report carries its own publication date and preliminary status.