EarthChem Home
Decade Home
About EarthChem
Overview
News
About DECADE
Help
Login
Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Iwatesan
Yakushidake (right) forms the summit of Iwatesan, and is a younger cone that was constructed over the eastern rim of NishiIwate caldera, the left-hand peak in this view from the SE. Eruptions have been recorded since the 17th century, mostly from the 500-m-wide summit crater and flank vents. Photo by Lee Siebert, 1977 (Smithsonian Institution).
Volcano Number:
283240
Volcano Name:
Iwatesan
Country:
Japan
Volcano Type:
Complex
Last Eruption:
1919 CE
Elevation:
2038m
Tectonic Setting:
Subduction zone / Continental crust (> 25 km)
Pop. within 5km:
439
Pop. within 10km:
18462
Pop. within 30km:
415920
Pop. within 100km:
2976795
Latitude:
39.853
Longitude:
141.001
Details
Hide
Viewed from the east, Iwatesan volcano has a symmetrical profile that invites comparison with Fuji, but on the west an older cone is visible containing an oval-shaped, 1.8 x 3 km caldera. After the growth of Nishi-Iwate volcano beginning about 700,000 years ago, activity migrated eastward to form Higashi-Iwate volcano. Iwate has collapsed seven times during the past 230,000 years, most recently between 739 and 1615 CE. The dominantly basaltic summit cone of Higashi-Iwate volcano, Yakushidake, is truncated by a 500-m-wide crater. It rises well above and buries the eastern rim of the caldera, which is breached by a narrow gorge on the NW. A central cone containing a 500-m-wide crater partially filled by a lake is located in the center of the oval-shaped caldera. A young lava flow from Yakushidake descended into the caldera, and a fresh-looking lava flow from the 1732 eruption traveled down the NE flank.
Download XLS
Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Show 29 Results
Hide Results
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.
Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal
Sorry. No data exist for this volcano in the EarthChem Portal.
Data from the SESAR Database
Show 3 Results
Hide Results
Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.
Data from UNAVCO
Sorry. No data exist for this volcano in the UNAVCO database.
Data from USIEI
Sorry. This volcano is not covered by any USIEI projects
Data from IRIS FDSNWS
Show 866 Results
Hide Results