Tromsø Geophysical Observatory Faculty of Science and Technology University of Tromsø, Norway.

Brorfelde, Denmark	Rømø, Denmark
Stasjon Nord, Greenland	.
Qaanaaq (Thule), Greenland	Savissivik, Greenland
Kullorsuaq, Greenland	Upernavik, Greenland
Danmarkshavn, East Greenland	Uummannaq, Greenland
Qeqertarsuaq (Godhavn), Greenland	Attu, Greenland
Kangerlussuaq (Søndre Strømfjord), Greenland	Maniitsoq (Sukkertoppen), Greenland
Nuuk (Godthåp), Greenland	Paamiut (Frederikshåp), Greenland
Narsarsuaq, Greenland	Tristan Da Cunha, South Atlantic Ocean
Hov, Føroyar	Summit, Greenland