This page contains the results of your search. It is divided into two sections. The first contains information about the eruption and the second part contains details about the source references and the date and time of the search. Click on the volcanic system name to retrieve more information.
| Source: | Hekla Volcanic System |
|---|---|
| Eruption site: | Hekla |
| VEI: | 3 |
| Lava volume: | 0.1 km3 |
| Tephra volume: | 0.060 km3 |
| Start Date: | 17 August 1980 AD 13:00 |
| End: | 16 April 1981 AD |
The volume of tephra is calculated as freshly fallen. This eruption was silicic, although there are no known deposits outside of Iceland. This eruption began with a plinian phase and lava was produced from simultaneously from fissures along the summit ridge. Most of the tephra was produced during the first 5 to 6 hours, with the highest amounts falling in the first two. The intensity of the eruption declined after the first day and ceased on August 20th. Activity began again on April 9 1981 when lava was erupted from the summit and craters on the northen side of the volcano. Again fluorine levels were high (1500 to 2000 ppm), but only about 600 sheep were affected.
The data on this page is from the following source(s). If you use this data please acknowledge the source of the data.
Larsen, G., Dugmore, A., J. and Newton, A.J. (1999) Geochemistry of historic silicic tephras in Iceland. The Holocene 9(4), 463-471.
Larsen, G., Vilmundardsttir, E. and Thorelsson, B. (1992) Heklugosid 1991: Gjoskufallid og gjoskulagid fra fyrsta degi gossins. (The 1991 eruption of Hekla: the tephra fall and tephra layer).. Natturufraedingurinn 61(3-4), 159-76.
Simkin, T., Siebert, L., Blong, R.J. and Russell, J. (1994) Volcanoes of the world : a regional directory, gazetteer, and chronology of volcanism during the last 10,000 years Geoscience Press, Tucson, with the Smithsonian Institution,349.
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This Tephrabase search was made on 6/8/2025 at 14:16:26 local time, Edinburgh, Scotland, UK.