International geomagnetic reference field—Its evolution and the difference in total field intensity between new and old models for 1965–1980

Abstract

The total magnetic field near the surface of the Earth is a sum of several constituent fields. Part of the total field consists of fields that are transient or rapidly varying. These fields are caused, either directly or indirectly, by electric currents in the upper atmosphere and beyond. The part of the total field that is more permanent arises from sources that are located inside the Earth. Evidence suggests that this part has two principal constituents: the main field and the crustal field.

Gravity and magnetic survey of the Oaxaca city region: Cenozoic horst-and-graben structure superimposed on the Oaxaca–Juarez terrane boundary, southern Mexico

“…The data were corrected for diurnal variation, and the IGRF (i.e., Peddie, 1983;Barraclough, 1987;IAGA, 1988IAGA, , 1992 was subtracted. The corresponding model used was the IGRF-9 (i.e., IAGA, 2003IAGA, , 2005.…”

International Geomagnetic Reference Field: The Seventh Generation

“…6, 1982 (in particular Peddie, 1982); Peddie (1983); Table 1. Evolution of the International Geomagnetic Reference Field.…”

Using Satellite Magnetic Survey Data for Spatial-Temporal Modeling of the Geomagnetic Secular Variation

“…More than 70000 carefully selected scalar observations from OGO-6 and POGO-8, covering the time interval from mid 1969 through early 1971, were used by Langel (1974) to develop a series of SH models for the epoch 19701, which was taken as a base for the DGRF-70 derivation (Peddie, 1982(Peddie, , 1983. The same was done by Quinn et al (1995) with POGS scalar observations covering the time interval from beginning of 1991 through about 1993.7.…”