|Elevation||227 m (745 ft)|
|Age of rock||5,000 years|
|Last eruption||3950 BCE ± 300 years|
The Stórhöfði peninsula immediately to the south of Helgafell in what is now southern Heimaey formed about 6000 years ago, with Helgafell forming from a secondary eruption a thousand years later. Immediately north of Helgafell is the active volcano Eldfell, which last erupted January 23, 1973.
Helgafell is a dormant cone volcano. Since Eldfell, (which is a slightly shorter volcano) erupted in 1973, it's very likely that Helgafell well erupt again too.
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