Grimsnes

Grimsnes (Iceland) is a volcanic field. It rises to 200 m above sea level. The GVP records 11 confirmed eruptions in the Holocene, the latest in 3,500 BCE.

Elevation: 200 m
Last eruption: 3,500 BCE
Confirmed eruptions: 11
Max VEI: 3
Country: Iceland
Location: 64.05° N, 20.88° W
Region (GVP): Iceland Neovolcanic Rift Volcanic Province
GVP type: Volcanic field
Tectonic setting: Rift zone / Oceanic crust (< 15 km)
Main rock type: Basalt / Picro-Basalt

Show on the timeline GVP entry ↗

Other volcanoes and strong earthquakes within 300 km

Eruption history

VEI – Volcanic Explosivity Index: 0 = lava outpouring, 4 = like Eyjafjallajökull 2010, 6 = like Pinatubo 1991, 7 = like Tambora 1815. The scale is logarithmic – each step is about 10 times more material.

Start	End	VEI	Vent and dating
c. 3,500 BCE	—	2	Kalfsholar · Correlation: Tephrochronology
c. 3,650 BCE	—	0	Borgarholar · Correlation: Tephrochronology
c. 3,750 BCE	—	0	Raudholar · Correlation: Tephrochronology
c. 3,900 BCE	—	0	Kolgrafarholl · Correlation: Tephrochronology
c. 4,000 BCE	—	2	Alftarholl · Correlation: Tephrochronology
c. 4,050 BCE	—	0	Borgaholl · Correlation: Tephrochronology
4,270 BCE ± 150 years	—	3	Kerholar · Isotopic: 14C (uncalibrated)
c. 4,450 BCE	—	2	Selholl North · Correlation: Tephrochronology
c. 4,500 BCE	—	0	Selholl South · Correlation: Tephrochronology
c. 6,250 BCE	—	?	Isotopic: 14C (calibrated)
c. 7,750 BCE	—	3	Seydisholar · Isotopic: 14C (calibrated)

Data: Global Volcanism Program, Smithsonian Institution (#371060)