17
Eruptions may also have occurred in 1896 south of Hellisey (Þórarinsson, 1965), possibly close
to Geirfuglasker and in 1637 south-west of Heimaey (Jóhannesson,
H., 1983). Other eruptions
have been dated using radioactive disequilibrium between isotopes including Helgafell (5,900
years BP; 226Ra/230Th; Sigmarsson, 1996), Sæfjall (sometimes called Sæfell; 6,220 years BP;
14C
/media/vedurstofan-utgafa-2020/VI_2020_011_en.pdf