Ilalian Magnetic Network at 1985.0

Abstract

The new national geomagnetic network of repeat stations for total field F, horizontal component H, vertical component Z and declination D, has been repeated in the frame of a collaboration between Istituto Nazionale di Geofisica and Istituto Geografico Militare Italiano. From the observed magnetic elements all repeat stations values were referred to 1985.0 and normal fields, in the form of a 2nd order polynomial in latitude and longitude, were computed. All geomagnetics maps published previously have been updated at 1985.0 and are published here with the secular variation pattern. An overview of all work, including a brief history of the recent Italian geomagnetic measurements, new normal fields coefficients and secular normal fields, are presented here.