Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Iwatesan
Iwate volcano displays two summit peaks when viewed from the SE. Yakushi-dake (right) forms the summit of Iwate, and is a younger cone that was constructed over the eastern rim of Nishi-Iwate caldera, the left-hand peak. Historical eruptions, mostly from the 500-m-wide summit crater of Yakushi-dake and vents on its flanks, have been recorded since the 17th century. Photo by Lee Siebert, 1977 (Smithsonian Institution).
Volcano Number:283240
Volcano Name:Iwatesan
Country:Japan
Volcano Type:Complex
Last Eruption:1919
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



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
283240 Iwatesan 17560 Confirmed Eruption Higashi-Iwate Radiocarbon (uncorrected) -3050
283240 Iwatesan 17561 Confirmed Eruption Nishi-Iwate PHD5 tephra Radiocarbon (corrected) -2950
283240 Iwatesan 17562 Confirmed Eruption Higashi-Iwate W6a-d tephras Tephrochronology -2700
283240 Iwatesan 17563 Confirmed Eruption Higashi-Iwate W5 tephra Radiocarbon (corrected) -2050
283240 Iwatesan 17564 Confirmed Eruption Nishi-yama Radiocarbon (corrected) -2000
283240 Iwatesan 17565 Confirmed Eruption Nishi-Iwate (O-jigokudani area) Radiocarbon (corrected) -1650
283240 Iwatesan 17566 Confirmed Eruption Higashi-Iwate Tephrochronology -1500
283240 Iwatesan 17567 Confirmed Eruption 3 Higashi-Iwate Radiocarbon (corrected) -1250
283240 Iwatesan 17568 Confirmed Eruption Nishi-Iwate Radiocarbon (uncorrected) -1150
283240 Iwatesan 17569 Confirmed Eruption Nishi-Iwate (O-jigokudani area) Radiocarbon (corrected) -450
283240 Iwatesan 17570 Confirmed Eruption Higashi-Iwate Radiocarbon (uncorrected) -350
283240 Iwatesan 17571 Confirmed Eruption Higashi-Iwate Radiocarbon (uncorrected) 150
283240 Iwatesan 17572 Confirmed Eruption 3 Higashi-Iwate (Myoko-dake) Tephrochronology 1300
283240 Iwatesan 17573 Confirmed Eruption Nishi-Iwate and Higashi-Iwate Radiocarbon (uncorrected) 1450
283240 Iwatesan 17575 Confirmed Eruption 3 Historical Observations 1686/3/26 1686/3/27
283240 Iwatesan 18054 Confirmed Eruption Tephrochronology -6450
283240 Iwatesan 18055 Confirmed Eruption Nishi-Iwate PHD8 tephra Radiocarbon (corrected) -6300
283240 Iwatesan 18056 Confirmed Eruption Nishi-Iwate PHD7 tephra Radiocarbon (corrected) -5650
283240 Iwatesan 18057 Confirmed Eruption Higashi-Iwate Radiocarbon (corrected) -4900
283240 Iwatesan 18058 Confirmed Eruption Nishi-Iwate PHD6 tephra Radiocarbon (corrected) -4850
283240 Iwatesan 18059 Confirmed Eruption 0 Higashi-Iwate Tephrochronology -4450
283240 Iwatesan 18060 Confirmed Eruption Higashi-Iwate Tephrochronology -4350
283240 Iwatesan 18061 Confirmed Eruption Higashi-Iwate Tephrochronology -3750
283240 Iwatesan 18062 Confirmed Eruption 0 Tephrochronology -3250
283240 Iwatesan 18063 Uncertain Eruption 2 ? 1687/4/14 1687
283240 Iwatesan 18064 Uncertain Eruption 2 ? 1689/6/22
283240 Iwatesan 18066 Confirmed Eruption 2 NE flank of Yakushi-dake Historical Observations 1732/1/22 1732
283240 Iwatesan 18068 Confirmed Eruption 1 W side of Onigajo caldera (O-jigokudani) Historical Observations 1919/7/15 1919/7/15
283240 Iwatesan 18069 Uncertain Eruption 1934 1935
Emissions Data from the Global Volcanism Program of the Smithsonian Institution No emissions data found for this volcano.


Data from the Earthchem Portal


Data from the SESAR Database


Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.