TERRA is a consulting firm with office in Uppsala, Sweden, and is run by Birger Fogdstam, Senior hydrogeologist, who 2011 ended a long position at the Geological Survey.

Fogdestams tasks during the many years of employment at the authority SGU has mostly involved groundwater mapping in Sweden. Studies on coastal groundwater (saline water problems) and the location of the fracture system with larger ground water discharge, has been high priority tasks.

The last international assignment, 2012, was a geological survay in Montenegro close to the Serbian border. The assignment was for irrigation.

Fogdestam has also conducted numerous geological and ground missions on the African continent such as Libya, Namibia, Botswana, Malawi, South Africa and Somalia 2011.

Most of the assignments have consisted of VLF surveys (Very Low Frequency) to locate groundwater.

Fogdestam has during a period of 5 years been head of the National Well Record Section, SGU and was more than 10 years head of the Department of Hydrogeology with more than 30 hydrogeologists and watertechnicians employed.

The purpose of TERRA is to act as a consultant, mainly specialized in exploration of groundwater in sedimentary and crystalline (granite) rocks in Sweden and Africa.

The geophysical equipment used in the investigations is the Swedish-WADI VLF equipment.

Undersökning med VLF-instrumentet i Somalia.

Investigation with the VLF instrument in Somalia.