Abstract In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted thirteenth generation Geomagnetic Reference Field (IGRF). This IGRF updates previous with a definitive main field model for epoch 2015.0, 2020.0, predictive linear secular variation 2020.0 to 2025.0. letter provides equations defining IGRF, spherical harmonic coe...

The paper describes the characteristics of the equatorial electrojet at Huancayo (HUA, 12.1 o S, 75.3 o W, inclination 1.5 o N, declination 1.0 o E) in western side of South America, where the geomagnetic field is aligned almost along the geographic meridian, and at Itinga (ITI, 4.3 o S, 47.0 o W, inclination 1.4 o N, declination 19.3 o W) in eastern part of South America, where the geomagnetic...

The modeling of the melody in a Text-To-Speech System is indispensable to have a good quality of synthesis and to approach the naturalness. The study of the melody generally includes the analysis of the local melody events relating to the accent and the declination of the global melody contour of an utterance. In this paper, we will present an experimental study of the declination phenomenon co...

15 Virtual globes allow geo-referencing and visualisation of diverse geologic datasets. A 16 vertical axis paleomagnetic rotation study in the Southern Pyrenees, Spain, is used to 17 illustrate the potential of virtual globes for representing paleomagnetic data. A macro 18 enabled workbook that we call P2K, allows KML files to be generated from 19 conventional paleomagnetic datasets. Cones and ...

Three magnetic components have been isolated in Ordovician formations of the Yangtze Paraplatform (South China Block). Two of these (Daqing A and Hongshiya B components) yield paleopoles that conform to the Carboniferous to Triassic segment of the apparent polar w•der path for South China, and are therefore interpreted as remagnetizations. The third component (declination/inclination = 30!ø/+66...