IEDA / DECADE Detail

Data from the Global Volcanism Program of the Smithsonian Institution

Details for: Unzendake

The large Unzen volcanic complex comprises much of the Shimabara Peninsula east of Nagasaki. Three large stratovolcanoes with complex structures, Kinugasa on the north, Fugen-dake in the east-center, and Kusenbu on the south, form topographic highs on the peninsula, seen here from across Shimabara Bay to its east. Historical eruptive activity has been restricted to the summit and flanks of Fugen-dake. The latest activity during 1990-95 formed a lava dome at the summit, accompanied by pyroclastic flows. Photo by Tom Casadevall, 1991 (U.S. Geological Survey).

Volcano Number:	282100
Volcano Name:	Unzendake
Country:	Japan
Volcano Type:	Complex
Last Eruption:	1996 CE
Elevation:	1483m
Tectonic Setting:	Subduction zone / Continental crust (> 25 km)
Pop. within 5km:	6979
Pop. within 10km:	76424
Pop. within 30km:	444737
Pop. within 100km:	7313362
Latitude:	32.761
Longitude:	130.299

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	Start Evidence Method	Start Date	End Date
282100	Unzendake	17166	Confirmed Eruption			Fugen-dake (Shimanomine)	Fission track	-4050
282100	Unzendake	17167	Confirmed Eruption			Fugen-dake	Radiocarbon (corrected)	-2720
282100	Unzendake	17168	Confirmed Eruption			Mayu-yama (Shichimen-zan)	Radiocarbon (corrected)	-2640
282100	Unzendake	17169	Confirmed Eruption			Mayu-yama (Tengu-yama)	Thermoluminescence	-2150
282100	Unzendake	17170	Confirmed Eruption			Fugen-dake (Kazaana)	Thermoluminescence	-1450
282100	Unzendake	17171	Confirmed Eruption			Fugendake-Sancho	Thermoluminescence	-1150
282100	Unzendake	17172	Uncertain Eruption					860
282100	Unzendake	17174	Confirmed Eruption	2	?	Fugen-dake (Tsukumo-jima Pond)	Historical Observations	1663	1663
282100	Unzendake	17175	Confirmed Eruption	2	?	NE flank of Fugen-dake (1200 m)	Historical Observations	1663/12/11	1663/12/27
282100	Unzendake	17176	Uncertain Eruption					1690	1692
282100	Unzendake	17177	Confirmed Eruption	2		Fugen-dake (summit, NNE), Mayu-yama	Historical Observations	1792/2/10	1792/7/22
282100	Unzendake	17178	Uncertain Eruption			Fugen-dake		1798/11/13	1798
282100	Unzendake	17181	Confirmed Eruption	1		Fugen-dake	Historical Observations	1990/11/17	1995/2/16
282100	Unzendake	17182	Confirmed Eruption	2		Fugen-dake	Historical Observations	1996/2/10	1996/5/1

Emissions Data from the Global Volcanism Program of the Smithsonian Institution

Sorry. No emissions data found for this volcano.

Data from the Earthchem Library

Title	Author	Release Date	DOI	Link
Global overview of pre-eruptive magma chamber conditions	Popa, Razvan-Gabriel	2021-07-30	10.26022/IEDA/112061	Details

Data from the Earthchem Portal

Sample ID	LINK	Method	Material	Rock Class	Rock Name	SiO₂ WT%	TiO₂ WT%	Al₂O₃ WT%	Fe₂O₃ WT%	FeO WT%	FeO Total WT%	MnO WT%	MgO WT%	CaO WT%	Na₂O WT%	K₂O WT%	P₂O₅ WT%	Total WT%	Ba PPM	Cr PPM	Cu PPM	Nb PPM	Ni PPM	Rb PPM	Sc PPM	Sr PPM	V PPM	Y PPM	Zn PPM	Zr PPM	⁸⁷Sr / ⁸⁶Sr RATIO
5	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	57.59	0.9	17.05	2.5	4.26		0.13	4.48	7.23	3.38	1.7	0.24	99.46
16	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	65.83	0.63	15.85	2.19	2.13		0.12	2.28	4.77	3.81	2.32	0.2	100
16	DETAILS	NOT GIVEN	Rock	Igneous Unknown Plutonic	Not-given	57.22	0.834	17.87	3.54	3.39		0.138	3.88	7.02	3.47	1.75	0.293	99.405
6	DETAILS	NOT GIVEN	Rock	Igneous Unknown Plutonic	Not-given	49.44	0.86	16.58	5.79	4.24		0.16	5.38	9.03	2.85	0.72	0.11	95.16
5	DETAILS	EMP (EPMA)	Rock	Igneous Unknown Volcanic	Not-given	0.06	43.78	0.22			51.56	0.53	2.42	0				98.57
LOBE 8?	DETAILS	XRF	Rock	Igneous Felsic Volcanic	Dacite	65.14	0.65	15.9			4.42	0.1	2.6	5.12	3.51	2.39	0.16	99.99	448	19	14	13	15	77	15	320	106	20	54	141
23	DETAILS	NOT GIVEN	Rock	Igneous Unknown Plutonic	Not-given	52.42	1.25	17.2	4.99	3.51		0.15	5.51	9.37	3.01	1.3	0.29	99
BOMB-04-2	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	72.8	0.2	12.6			1.1	0	0.2	0.9	3	5.3		96.1
1986	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	78.33	0.13	10.8			0.65	0.02	0.34	0.91	2.61	3.76	0.05	97.6
5	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	58.15	0.75	17.69	2.72	4.41		0.11	3.45	7.2	2.52	1.68	0.12	98.8
5	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	58.13	0.87	16.97	7.26			0.12	3.92	6.73	3.32	1.8		99.12						46		471
5	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Andesite																										0.70419
UZ01	DETAILS	PGNAA	Rock	Igneous Felsic Volcanic	Dacite
UZ01	DETAILS	XRF	Rock	Igneous Felsic Volcanic	Dacite	64.55	0.64	15.98	4.85			0.09	2.33	4.54	3.74	2.57	0.13	99.42	503	30		13	21	90		352	86	15		158
4	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	57.94	0.81	17.31	2.89	3.9		0.17	4.72	7.51	2.74	1.8	0.16	99.95
C14-1-1, 1977.4	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	75.87	0.29	12.68			0.97	0.04	0.29	1.88	2.98	4.02	0.12	99.14
10	DETAILS	NOT GIVEN	Rock	Igneous Intermediate Volcanic	Andesite	59.52	0.83	16.44	2.32	3.83		0.11	3.34	5.99	2.89	2.42	0.13	97.82
1991	DETAILS	MC_ICPMS	Rock	Igneous Felsic Volcanic	Dacite																										0.704478
V	DETAILS	EMP (EPMA)	Rock	Igneous Unknown Plutonic	Not-given	45.26	1.32	7.43		13.79			14.35	11.89	1.19	0.43		95.66
U2-A E1-2 (P)	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	56.29		26.79		0.32				8.82	6.28	0.32		98.82
U2-A E1-2 (P)	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	55.79		26.5		0.24				8.95	6.13	0.38		97.99
U2-A E1-2 (P)	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	56.92		26.37		0.11				8.54	6.15	0.41		98.5
U2-A E1-2 (P)	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	58.05		25.66		0.21				7.58	6.88	0.5		98.88
U2-A E1-2 (P)	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	56.86		26.04		0.25				8.42	6.2	0.43		98.2
U2-A E1-2 (P)	DETAILS	EMP (EPMA)	Rock	Igneous Felsic Volcanic	Dacite	55.92		27.02		0.18				9.31	6.12	0.37		98.92

1234567Next

Data from the SESAR Database

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

Data from the MaGa Database

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