IEDA / DECADE Detail

Data from the Global Volcanism Program of the Smithsonian Institution

Details for: Hokkaido-Komagatake

The truncated Komaga-take volcano on the Oshima Peninsula of southern Hokkaido rises to the north above Lake Onuma. Komaga-take is one of the most active volcanoes of Japan's northernmost island. The sharp-peaked summit is the rim of a breached crater that formed as a result of edifice collapse. Hummocky debris-avalanche deposits were responsible for the formation of Lake Onuma. A period of more frequent explosive activity began with a major explosive eruption in 1640, one of the largest in Japan during historical time. Photo by Ichio Moriya (Kanazawa University).

Volcano Number:	285020
Volcano Name:	Hokkaido-Komagatake
Country:	Japan
Volcano Type:	Stratovolcano
Last Eruption:	2000 CE
Elevation:	1131m
Tectonic Setting:	Subduction zone / Continental crust (> 25 km)
Pop. within 5km:	173
Pop. within 10km:	23091
Pop. within 30km:	234213
Pop. within 100km:	962081
Latitude:	42.063
Longitude:	140.677

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
285020	Hokkaido-Komagatake	18559	Confirmed Eruption	5			Tephra layer Ko-g	Radiocarbon (corrected)	-4600
285020	Hokkaido-Komagatake	18560	Confirmed Eruption				NS1 and NS2 tephras	Tephrochronology	-4500
285020	Hokkaido-Komagatake	18561	Confirmed Eruption	4	P		Tephra layer Ko-f	Radiocarbon (corrected)	-4350
285020	Hokkaido-Komagatake	18562	Confirmed Eruption	5			Tephra layer Ko-d	Historical Observations	1640/7/31	1640/10/9
285020	Hokkaido-Komagatake	18563	Confirmed Eruption	4			Tephra layer Ko-c2	Historical Observations	1694/7/4	1694/7/6
285020	Hokkaido-Komagatake	18564	Uncertain Eruption						1710/6/27
285020	Hokkaido-Komagatake	18565	Uncertain Eruption	2					1765
285020	Hokkaido-Komagatake	18566	Uncertain Eruption	2					1784/2/8
285020	Hokkaido-Komagatake	18567	Confirmed Eruption	4		Ansei Crater	Tephra layer Ko-c1	Historical Observations	1856/9/25
285020	Hokkaido-Komagatake	18568	Confirmed Eruption	2		NW side of 1856 (Ansei) crater		Historical Observations	1888/4/14
285020	Hokkaido-Komagatake	18569	Confirmed Eruption	2		South of Ansei Crater		Historical Observations	1905/8/19	1905/9/1
285020	Hokkaido-Komagatake	18570	Confirmed Eruption	2		SE of Ansei Crater		Historical Observations	1919/6/17	1919/7/26
285020	Hokkaido-Komagatake	18571	Confirmed Eruption	2				Historical Observations	1922/5/22
285020	Hokkaido-Komagatake	18572	Confirmed Eruption	2				Historical Observations	1923/2/27	1923/3/15
285020	Hokkaido-Komagatake	18573	Confirmed Eruption	2				Historical Observations	1924/7/31
285020	Hokkaido-Komagatake	18574	Confirmed Eruption	1				Historical Observations	1928/3/28
285020	Hokkaido-Komagatake	18575	Confirmed Eruption	4		SE and NE of Ansei Crater	Layer Ko-a	Historical Observations	1929/6/17	1929/9/6
285020	Hokkaido-Komagatake	18577	Uncertain Eruption						1935/10/15	1935/10/15
285020	Hokkaido-Komagatake	18578	Confirmed Eruption	1				Historical Observations	1937/3/17	1937/3/19
285020	Hokkaido-Komagatake	18579	Confirmed Eruption	3		NW-SE 1.6-km fissure		Historical Observations	1942/11/16	1942/11/18
285020	Hokkaido-Komagatake	18580	Confirmed Eruption	1		1929 crater and summit crater fissure		Historical Observations	1996/3/5	1996/3/12
285020	Hokkaido-Komagatake	18581	Confirmed Eruption	2		1996 crater		Historical Observations	1998/10/25	1998/10/25
285020	Hokkaido-Komagatake	18582	Confirmed Eruption	1				Historical Observations	2000/9/4	2000/11/8

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%	FeO Total WT%	MnO WT%	MgO WT%	CaO WT%	Na₂O WT%	K₂O WT%	P₂O₅ WT%	Total WT%	Ba PPM	Co PPM	Cr PPM	Ga PPM	Ni PPM	Pb PPM	Rb PPM	Sc PPM	Sr PPM	V PPM	Y PPM	Zn PPM	Zr PPM
FA1-5	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Andesite	61.16	0.715	17.001	6.977	0.208	2.766	6.985	3.096	0.924	0.168	100	229.672	37.926	5.069	12.755	3.48	8.831	24.509	20.537	400.275	82.795	30.812	64.012	72.843
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	50.62		30.73	0.61		0.05	14.11	3.06	0.06		99.24
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	50.44		30.7	0.62		0.04	14.6	3.14	0.07		99.61
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	51.92		30.32	0.57		0.04	13.46	3.56	0.08		99.95
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	51.68		29.98	0.47		0.02	13.41	3.54	0.11		99.21
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	50.74		30.73	0.44		0.03	14.23	3.28	0.1		99.55
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	54.35		28.08	0.43		0.03	11.58	4.61	0.2		99.28
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	53.39		28.61	0.52		0.04	12.2	4.16	0.11		99.03
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	51.02		30.02	0.56		0.05	13.75	3.4	0.09		98.89
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	54.56		27.87	0.49		0.04	11.16	4.77	0.16		99.05
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	52.63		28.89	0.99		0.16	12.84	3.76	0.07		99.34
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	52.54		28.87	0.99		0.17	12.88	3.99	0.04		99.48
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	52.75		28.65	1.04		0.18	12.96	3.71	0.05		99.34
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	53.13		28.2	1.02		0.14	12.28	4.22	0.06		99.05
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	51.35		29.87	0.89		0.13	13.93	3.46	0.04		99.67
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	47.75		32.5	0.68		0.07	16.63	1.81	0.01		99.45
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	50.21		30.62	0.78		0.12	14.48	2.88	0.03		99.12
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	52.71		28.61	1.03		0.16	12.9	3.92	0.05		99.38
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	51.75		29.09	0.94		0.16	13.47	3.5	0.04		98.95
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	48.63		30.29	0.79		0.12	14.95	2.81	0.03		97.62
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	51.1		30.38	0.74		0.11	14.38	3.25	0.04		100
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	52.63		29.22	0.92		0.16	13.02	3.99	0.05		99.99
1-4-9_2	DETAILS	EMP (EPMA)	Rock	Igneous Intermediate Volcanic	Andesite	50.76		30.65	0.76		0.13	14.25	3.41	0.04		100
FA13-5	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Andesite	61.17	0.696	17.181	6.934	0.206	2.654	6.914	3.142	0.932	0.17	99.999	237.83	32.5	5.138	13.128	2.581	10.557	23.519	21.335	395.486	81.727	32.597	63.114	74.426
FA7-5	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Andesite	60.988	0.724	16.752	7.282	0.22	2.923	6.899	3.093	0.942	0.178	100	235.923	41.643	5.926	13.233	4.693	8.066	24.653	20.406	387.608	82.922	31.132	63.447	73.901

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Data from the SESAR Database

IGSN	Object Name	Object Type	Object Class	Material	Field Name	Link
NHB0040WO	NMNH 61743 (PET)	Individual Sample		Rock>Igneous	Pyroxene andesite with pyroxene and quartz	Details
NHB006IXK	NMNH 116397-2 (PET)	Individual Sample		Rock>Igneous	Pumice	Details

Data from the MaGa Database

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