IEDA / DECADE Detail

Data from the Global Volcanism Program of the Smithsonian Institution

Details for: Longonot

Longonot as seen from the flanks of Suswa volcano (SSW of Longonot) in the Eastern Rift Valley of Kenya. The modern cone was constructed within a broad 8 x 12 km caldera and itself contains a smaller 1.8-km-wide summit crater that gives the summit a flat profile. Post-caldera lavas are found on the caldera floor and on the flanks. Masai tradition records a lava flow on the N flank during the 19th century. Photo by Tom Jorstad, 1990 (Smithsonian Institution).

Volcano Number:	222100
Volcano Name:	Longonot
Country:	Kenya
Volcano Type:	Stratovolcano
Last Eruption:	1863 CE
Elevation:	2776m
Tectonic Setting:	Rift zone / Continental crust (> 25 km)
Pop. within 5km:	809
Pop. within 10km:	17893
Pop. within 30km:	410677
Pop. within 100km:	8750154
Latitude:	-0.914
Longitude:	36.446

Eruption Data from the Global Volcanism Program of the Smithsonian Institution

Volcano Number	Volcano Name	Eruption Number	Activity Type	Explosivity Index Max	Activity Area	Start Evidence Method	Start Date
222100	Longonot	13994	Confirmed Eruption			Radiocarbon (uncorrected)	-7200
222100	Longonot	13995	Confirmed Eruption			Radiocarbon (uncorrected)	-1330
222100	Longonot	13996	Confirmed Eruption	0	Northern flank	Anthropology	1863

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 Total WT%	MnO WT%	MgO WT%	CaO WT%	Na₂O WT%	K₂O WT%	P₂O₅ WT%	Total WT%	Ba PPM	Cr PPM	Cu PPM	Dy PPM	Ga PPM	Nb PPM	Ni PPM	Pb PPM	Rb PPM	Sr PPM	U PPM	Y PPM	Zn PPM	Zr PPM	¹⁴³Nd / ¹⁴⁴Nd RATIO	²⁰⁶Pb / ²⁰⁴Pb RATIO	²⁰⁷Pb / ²⁰⁴Pb RATIO	²⁰⁸Pb / ²⁰⁴Pb RATIO
30LP8	DETAILS	ICPMS	Rock	Igneous Intermediate Volcanic	Trachyte												4.9			22.4				22.3		1.2	4.9
30LP8	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Trachyte												4.87														0.512597	19.64	15.67	39.43
30LP8	DETAILS	TIMS_ID	Rock	Igneous Intermediate Volcanic	Trachyte																						4.9
30LP8	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Trachyte	62.07	0.561	12.84	9.92	0.328	0.19	1	7.06	4.56	0.062	98.591		10	9		37	229	3		180			129	300	1115
27LT2	DETAILS	ICPMS	Rock	Igneous Intermediate Volcanic	Trachyte												194			11.4				12.5		7.6	2.1
27LT2	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Trachyte																										0.512585	19.66	15.68	39.44
27LT2	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Trachyte	61.99	0.667	14.95	7.85	0.272	0.44	1.43	6.34	5.17	0.098	99.207		4	6		30	119	2		110			68.9	172	580
3LT2	DETAILS	ICPMS	Rock	Igneous Intermediate Volcanic	Trachyte												5.1			22.7				22.7		0.9	4.8
3LT2	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Trachyte												5.1														0.512622	19.63	15.67	39.4
3LT2	DETAILS	TIMS_ID	Rock	Igneous Intermediate Volcanic	Trachyte																						4.87
3LT2	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Trachyte	61.98	0.558	12.67	9.93	0.336	0.22	1.08	7.33	4.64	0.057	98.801		5	8		38	231	2		187			131	309	1128
38LMX1	DETAILS	ICPMS	Rock	Igneous Intermediate Volcanic	Trachyte												459			5.69				6.3		45.5	1
38LMX1	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Trachyte																										0.512637	19.63	15.69	39.44
38LMX1	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Trachyte	60.32	1.016	16	7.51	0.223	1.01	2.5	6.08	4.96	0.243	99.862		11	9		22	55.8	3		59.2			38.9	119	262
12CLT2	DETAILS	ICPMS	Rock	Igneous Intermediate Volcanic	Trachyte												80.7			22.1				19.1		10.1	5.1
12CLT2	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Trachyte																										0.51261
12CLT2	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Trachyte	61.13	0.601	12.85	9.75	0.329	0.24	1.17	7.43	4.69	0.086	98.276		7	9		36	212	0		174			120	288	1033
1LT3	DETAILS	ICPMS	Rock	Igneous Intermediate Volcanic	Trachyte												24.6			24.8				26.2		4.5	4.6
1LT3	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Trachyte												24.6															19.66	15.69	39.47
1LT3	DETAILS	TIMS_ID	Rock	Igneous Intermediate Volcanic	Trachyte																						4.24
1LT3	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Trachyte	61.4	0.626	12.9	10.2	0.351	0.33	1.23	7.12	4.73	0.099	98.986		6	9		37	211	3		166			120	285	1032
45LT3	DETAILS	ICPMS	Rock	Igneous Intermediate Volcanic	Trachyte												23.9			19.8				22.2		3.8	4.9
45LT3	DETAILS	TIMS	Rock	Igneous Intermediate Volcanic	Trachyte												23.9															19.64	15.68	39.42
45LT3	DETAILS	TIMS_ID	Rock	Igneous Intermediate Volcanic	Trachyte																						5.36
45LT3	DETAILS	XRF	Rock	Igneous Intermediate Volcanic	Trachyte	61.41	0.629	12.91	10.2	0.355	0.3	1.25	7.51	4.73	0.091	99.385		10	9		36	212	1		166			121	287	1035

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Data from the SESAR Database

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

Data from the MaGa Database

Location: Longonot volcano (View Details at MaGa DB)

Description: Longonot volcano is situated in the southern Kenyan Rift and is one of 12 Quaternary volcanoes that line the central rift grabens. It is a large caldera volcano, consisting of a relativelymodern trachyte cone situated within a 12 km caldera structure.

Hazard Description: not reported

Type: soil_diffuse_emission

Region: Nakuru County, Kenya

Country: Kenya

Volcanic Complex: Longonot

Gas Flux Data:

Measurement Name	Detail	Date	Specie	Flux	Std. Dev.	Unit of Measure
Longonot_01112012	Detail	2012/11/01	CO2	0.3	0	Mg/d