Geomagnetic Observations

The oldest routine task of SGO is the regular measurement of the geomagnetic field. The measurements began on 1st January 1914 and continue until today. The only gap in the time series is between 16th September 1944 and 1st January 1947 due to the destruction of the observatory during the war.

The analog La Cour was in operation until 31st December 1995. Nowadays digital data is produced in the variation room of the observatory by a Polish torsion photoelectric magnetometer (TPM), a Russian TPM magnetometer and a Danish fluxgate magnetometer (FGE). Weekly measurements of the absolute magnetic field provide the base line control.

Co-ordinates:
Geographic:	67° 22' N, 26° 38' E
Geomagnetic:	63.8°, 120.0°, -26.7°, dip = 76.7°
Corrected geomagnetic:	64.0°, 107.2°, L-value 5.3
Altitude a.s.l.:	180 metres

Observer in charge until now:

Mr. Tero Raita

Geophysicist

Sodankylä Geophysical Observatory

Tähteläntie 62

FIN-99600 Sodankylä, Finland

Phone: +358-(0)16-619811

Fax: +358-(0)16-619875

e-mail: to Tero Raita

(Mr. Johannes Kultima has retired on 1 November 2009.)