IEDA / DECADE Detail

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 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

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

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

Sample ID	LINK	Method	Material	Rock Class	Rock Name	SiO₂ WT%	TiO₂ WT%	Al₂O₃ WT%	Fe₂O₃ WT%	Fe₂O₃ Total WT%	FeO WT%	MnO WT%	MgO WT%	CaO WT%	Na₂O WT%	K₂O WT%	P₂O₅ WT%	Total WT%	Ba PPM	Co PPM	Cr PPM	Cs PPM	Cu PPM	Dy PPM	Nb PPM	Ni PPM	Pb PPM	Rb PPM	Sc PPM	Sr PPM	U PPM	V PPM	Y PPM	Zn PPM	Zr PPM	⁸⁷Sr / ⁸⁶Sr RATIO
35	DETAILS	FTSC	Rock	Igneous Mafic Volcanic	Basalt																										0.07
35	DETAILS	INAA	Rock	Igneous Mafic Volcanic	Basalt														98	32.1	117								28.7
16	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	54.86	0.83	18.11	3.23		5.33	0.16	3.3	9.04	2.5	0.34	0.15	97.85
29	DETAILS	NOT GIVEN	Rock	Igneous Mafic Volcanic	Basalt	51.84	0.77	19.76	2.63		6.44	0.15	4.29	11.37	1.79	0.2	0.06	99.3
26	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite										2.3	0.43		2.73
26	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	55.28	0.68	16.38	2.93		6.58	0.13	5.06	9.18			0.1	96.32
VIW-17	DETAILS	XRF	Rock	Igneous Mafic Volcanic	Basalt	49.31	0.79	17.4		11.14		0.17	8.87	10.36	1.73	0.07	0.09	99.93
24	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	53.14	0.69	20.21	4.16		4.62	0.14	2.72	9.69			0.11	95.48
24	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite										2.55	0.47		3.02
25	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	53.59	0.92	18.1	2.17		7.41	0.14	4.5	9.51			0.1	96.44
25	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite										2.11	0.41		2.52
5	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	52.68	0.74	18.34	2.78		6.86	0.15	4.53	9.88	2.36	0.4	0.17	98.89
TD42	DETAILS	AAS	Rock	Igneous Intermediate Volcanic	Andesite								4.62		2.62	0.51		7.75
TD42	DETAILS	GRAV	Rock	Igneous Intermediate Volcanic	Andesite	55.58												55.58
TD42	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Andesite																															0.70419
TA-2	DETAILS	MS_ID	Rock	Igneous Intermediate Volcanic	Andesite														217					5.8
TA-2	DETAILS	WET	Rock	Igneous Intermediate Volcanic	Andesite	60.17	0.99	15.71	2.55		5.95	0.17	2.54	6.5	3.52	0.73	0.18	99.01
9	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	56.25	0.88	17.52	3.48		6.29	0.11	3.57	7.28	2.62	1	0.1	99.1
7	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	52.84	0.83	18.4	3.27		6.24	0.15	4.38	9.87	2.35	0.39	0.11	98.83		29	20	1.3	43		3.1	18	3	9	27	277		223	17	77	52
7	DETAILS	NAA	Rock	Igneous Intermediate Volcanic	Andesite
7	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite														1	29	20	1.34	43		3.2	18	3	9.6	22.1	288		223	16.1	71	50.5	0.704788
5	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	52.11	0.92	17.64	3.07		7.69	0.12	4.26	9.88	2.51	0.28	0.1	98.58
10	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	59.86	0.47	17.34	2.24		6.41	0.14	2.69	6.9	3.37	0.75	0.13	100
9	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	53.65	0.95	18.23	3.28		6.57	0.15	4.04	8.87	2.4	0.35	0.1	98.59
IW02	DETAILS	ICPMS	Rock	Igneous Mafic Volcanic	Basalt														59.7			0.176		2.14	1.21		2.38	1.29	34.8	281	0.055	259.35	13.6		27.5

12Next

Data from the SESAR Database

IGSN	Object Name	Object Type	Material	Field Name	Link
NHB000MMZ	NMNH 117272-00 (MIN)	Individual Sample	Mineral>Osarizawaite	Osarizawaite	Details
NHB00138E	NMNH 138546-00 (MIN)	Individual Sample	Mineral>Osarizawaite	Osarizawaite	Details
NHB001HW0	NMNH 157694-00 (MIN)	Individual Sample	Mineral>Osarizawaite	Osarizawaite	Details

Data from the MaGa Database

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