The biggest eruption was in 1104 AD when it erupted without warning ejecting millions of tonnes of tephra. The most active part of this ridge, a The volcano's frequent large eruptions have covered much of Iceland with Hekla has an elevation of about 4,887 feet. It is Iceland’s most active and best-known volcano. Some eruptions have been so powerful and violent that the volcanic ash reached as far as mainland Europe. One of Iceland's most prominent and active volcanoes, Hekla lies near the southern end of the eastern rift zone. The lava field then had an area of 5.8 km². Gradually the number of active craters decreased, the most active of these built a cone 100 m higher than the level of the ridge. Hekla is the most active volcano in Iceland with eruption events numbering from as low as 15 major eruptions to the huge number of 167 since 1104, the most recent being in 1991. Hekla, active volcano, southern Iceland, lying within the country’s East Volcanic Zone.
Hekla occupies a rift-transform junction, and has produced basaltic andesites, in contrast to the tholeiitic basalts typical of Icelandic rift zone volcanoes.
Many lava bombs were found near the main crater, one had an area of 6 m² and a likely weight of 12 tons.
It erupted four times in the 20th century, the last time in 2000. It was around October, in the year 1104. The lava was andesite containing olivine, similar to the lava produced later in the eruption of 1947.Before the eruption, a greater than normal amount of snow melting had occurred, indicating the volcano was heating up. Hekla is part of a volcanic ridge, 40 km long. Hekla has erupted more often than any other volcano in Iceland. Some are very short (a week to ten days) whereas others can stretch into months and years. The whole mountain ridge of Hekla is about 40 km long. The larger cones produced more tephra, occasionally with lightning within the tephra cloud. The 1947 eruption that started on 29 March 1947 ended in April 1948. The eruption occurred at 6:41 am ± 3 min with a loud roar; later eruptions could be heard throughout Iceland.
The 5×10Starting 13 January and lasting for over 7 months the eruption was one of Hekla's most destructive (VEI 4). In October 2011 a German left-wing militant group called the For the barque purchased in 1902 for use by the Scottish National Antarctic Expedition, see Note: Volcanoes listed here are "central volcanoes" unless a It has been compared with Brocken and Vesuvius and the trio were thought to be the gateways down to Hell.Hekla’s notoriety continued through the next three centuries, the volcano appearing as a symbolic entity in the works of several European authors. Eruptions of Hekla are extremely varied and difficult to predict. The European name for Hekla was “Hekkenfeld”, the name that the great Icelandic Nobel Laureate Halldór Kiljan Laxness also used in his novel It is thought that Hekla has had at least twenty eruptions since the settlement of Iceland in the year 874 AD.
It was a VEI 3 eruption producing a lava volume of 0.189 kmEruption activity was at a maximum in the first hour, and by the first night the fissure on Hekla had opened to a length of 6–7 km. By 5 July, the eruption had stopped.During eruptions of Hekla, fluorine is produced and sticks to the surfaces of the grains of tephra. Hekla is a stratovolcano, located near the southern end of the eastern rift zone in Iceland.
It had a VEI of 3 and produced 0.2 km³ of lava covering an area of 18.5 km² and 6.6×10 The main Hekla fissure only erupted at its far southwest end, most of the eruption was from other fissures nearby.