Sigurdur Thórarinsson (Sigurður Þórarinsson) was an Icelandic geologist and volcanologist.
Fire on Heimaey 1990
Writer
Vatnajökull 1977
as Narrator, Screenplay
The Eruption of Hekla 1947/8 1972
as Narrator (voice), Writer
Birth of an Island 1964
The Hillside Is Beautiful 1955
Actor, Screenplay
Credits from TMDB.