The Grímsvötn volcanic system is the most active in Iceland. It consists of a central volcano and a fissure swarm, about 100 km long and 18 km wide, rising to 1700 m. It is partly covered by up to 700 m thick ice and the central volcano has an ice…
The 60 km long Hengill volcanic system has been moderately active with nine volcanic eruptions in the Holocene. The Hengill system is located at the intersection of the Western Volcanic Zone, the Reykjanes Volcanic Zone and the South Iceland Seismic…
The Hofsjökull volcanic system on the Central Iceland Volcanic Zone is a low-activity system, in spite of its location in the area of the Iceland hotspot. The last known eruption took place several thousand years ago and left a lava flow.
The Hrómundartindur volcanic system has not erupted since early Holocene time, circa 11,000 years ago when a small basaltic lava flow erupted from a single crater or a short fissure. The Hrómundartindur system is about 25 km long, consisting of a…
The partly ice covered Katla volcano has been highly active in the Holocene with at least 21 eruption in the last 1100 years. The last eruption to break through the ice took place in 1918. The Katla system lies on the Eastern Volcanic Zone and is…
Skjaldbreiður is a shield volcano within the Oddnýjarhnúkur-Langjökull system
The Prestahnúkur volcanic system has been moderately active with six eruptions in Holocene time. The last eruption took place around 900. The volcanic system is located on the west margin of the Western Volcanic Zone. It is about 90 km long and 15…
The Tindfjallajökull volcanic system has not been active since in the early Holocene (inactive during the last 8000 years). Tindfjallajökull lies on the Eastern Volcanic Zone and is a central volcano, 15-20 km in diameter, rising to 1464 m. It has a…
The Torfajökull volcanic system has been moderately active in the Holocene, with the last eruption occurring in 1477. It is located in the Eastern Volcanic Zone where rifting propagates into previously unrifted crust. The system consists of central…
The Tungnafellsjökull volcanic system on the Central Iceland Volcanic Zone is a low activity system, in spite of its location in the central area of the Iceland hotspot, the last eruption being a small effusive eruption several thousand years ago.…
The Vestmannaeyjar volcanic system has been moderately active in the Holocene with the latest eruption occurring in 1973. The system is 30-35 km long and 20-25 km wide, forming an archipelago 10-30 km off the south coast of Iceland reaching a…
The Öræfajökull volcanic system has been moderately active in the Holocene. The last eruption was a moderate explosive eruption in 1727. The Öræfajökull system lies on a volcanic belt outside the main volcanic zones and consists of a central volcano…
The Þórðarhyrna central volcano has been moderately active during the Holocene, with the last eruption occurring in 1903. It is the second and less active central volcano on the Grímsvötn-Laki volcanic system, located about 20 km SW of the more…