Available Weekly Reports
There are no activity reports for Vestmannaeyjar.
Summary of eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1973 Jan 23||1973 Jun 28||Confirmed||3||Historical||Heimaey (Eldfell)|
|1963 Nov 8||1967 Jun 5||Confirmed||0||Historical||Surtsey|
|1896 Sep||Unknown||Confirmed||Historical||South or SE of Hellisey|
|1637 Oct||1638 Feb 28 ± 60 days||Confirmed||Historical||SW of Heimaey ?|
|3950 BCE ± 300 years||Unknown||Confirmed||Uranium-series||Heimaey (Helgafell)|
|4270 BCE ± 200 years||Unknown||Confirmed||3||Radiocarbon (corrected)||Heimaey (Saefell tuff cone)|
|4550 BCE ± 500 years||Unknown||Confirmed||Tephrochronology||Heimaey (Stórhöfdi tuff cone)|
|6050 BCE (?)||Unknown||Confirmed||Tephrochronology||Alsey, Brandur, Sudurey, Hellisey|
|7550 BCE (?)||Unknown||Confirmed||3||Tephrochronology||NW Heimaey (Nordurklettar)|
|8050 BCE (?)||Unknown||Confirmed||4||Tephrochronology||NW Heimaey (Háin tuff ring)|
The mostly submarine Vestmannaeyjar volcanic system is the southernmost and youngest volcanic center of the eastern volcanic zone that cuts across east-central Iceland. It consists of a roughly 30 x 40 km group of basaltic volcanic islands and submarine cones occupying a shallow shelf off the south coast of Iceland. Vestmannaeyjar was the site of two of Iceland's most noted 20th-century eruptions. The new island of Surtsey grew from the ocean floor during 1963-67. The island of Heimaey, 20 km to the NE, was the site of dramatic eruptions in 1973 during which lava flows partially overran the town of Vestmannaeyjar and threatened its harbor. Several other volcanoes have erupted during historical time. Twenty-two postglacial eruption sites are known in the Vestmannaeyjar system, and all ten subaerial vents on Heimaey are of Holocene age.