1. Centre for Earth Evolution and DynamicsUniversity of Oslo Norway
2. Department of Geosciences and GeographyUniversity of Helsinki Finland
3. Physics DepartmentUniversity of Helsinki Finland
4. School of Geological Sciences and Engineering, Yachay Tech Ibarra Ecuador
5. Department of GeologyUniversity of Tartu Estonia
6. Department of Geological and Mining Engineering and SciencesMichigan Technological University Houghton MI USA
7. Department of Earth, Ocean and Ecological SciencesUniversity of Liverpool UK