Abstract In December 2019, the 13th revision of International Geomagnetic Reference Field (IGRF) was released by Association Geomagnetism and Aeronomy (IAGA) Division V Working Group V-MOD. This comprises two new spherical harmonic main field models for epochs 2015.0 (DGRF-2015) 2020.0 (IGRF-2020) a model predicted secular variation interval to 2025.0 (SV-2020-2025). The were produced from cand...

Background. The effect of geomagnetism on human immunity has so far been studied through long-term observations. Recently, we have detected the immediate immunotropic effects disturbances geomagnetic field (Ap-index) at multiple sclerosis patients. aim this study was to identify another contingent people. Material and methods. object observation were 21 men (24-63 y) 20 women (33-62 with neuroe...

Abstract. Kakioka Magnetic Observatory (KMO) was founded in 1913 by the Central Meteorological (CMO, later Japan Agency) as a successor to Tokyo Observatory. village 70 km north of and selected escape from tram noise Tokyo. At first, it an unstaffed observatory only for geomagnetic field observation. Then, Great Kanto Earthquake 1923 changed fate KMO because earthquake severely damaged CMO Toky...

Some reports have suggested that epileptic seizures might occur more frequently at times of enhanced disturbance of the geomagnetic field. This study examines this putative association using 4101 seizures from 22 epileptic patients where the seizure times were known to within a day or better. A measure of the geomagnet-ic fluctuation level for the seizure day, and the days preceding the seizure...

A strong interplay between charge, lattice, orbital and spin degrees of freedom exists in transition-metal oxides yielding the emergence of a large spectrum of functionalities such as hightemperature superconductivity, metal/insulator transition, multiferroicity, thermoelectricity... More specifically, mixed valence states of 3d elements issue as a driving force in such interplay. In addition, ...

3 Mathematics plays a fundamental role in all scientific fields and, of course, in the Geosciences. This has been especially well known since, for example, the beginning of geodesy in the Greek era (VANI´Č EK and KRAKIWSKY 1992) or in the pioneering studies of planet Earth's interior and the description of the Earth's potential fields (geomagnetic and gravimetric). We can remember that Johann C...

The theory of planetary dynamos and its applications to observed phenomena of planetary magnetism are outlined. It is generally accepted that convection flows driven by thermal or compositional buoyancy are the most likely source for the sustenance of global planetary magnetic fields. While the existence of dynamos in electrically conducting fluid planetary cores provides constraints on propert...

Introduction: Mars is a planet of many apparent dichotomies in topography, atmospheric evolution , hydrology, and geomagnetism. We describe yet another set of extremes in the area of atmospheric chemistry. While solar photons in fair-weather are a known and well-studied driver of Martian chemistry, there is increasing evidence that electro-chemistry unique to dust storms may be a second new dri...

In plants with alternately arranged foliage, such as the coconut palm (Cocos nucifera), leaves are attached to the stem in either an ascending clockwise (left handed [L]) or counterclockwise (right handed [R]) spiral (Fig. 1). Foliar spiral direction (FSD) is not genetically determined in coconut palms: All crosses (R 3 R, R 3L, L 3 R, L 3 L) yield R and L progeny in approximately equal numbers...