Abstract Geomagnetism, similar to other areas of geophysics, is an observation-based science. Data agreement between comparative geomagnetic vector observations one the most important evaluation criteria for high-quality data. The main influencing factors affecting observational data are attitude angle, scale factor, long-term time drift, and temperature. In this paper, we propose a method base...

The dynamo action, which is of importance in the study geomagnetism mechanism, considered to be caused by convection structure formed inside a rotating spherical shell. This elongated rotation axis generated action both heat and on fluid In this study, we analyzed thermal such shell attempted understand phenomenon convective structure. It known that each value Prandtl number, Ekman number Rayle...

Abstract The publication by Stauning (2022b, 10.1029/2022JA030355 ): “The use of invalid Polar Cap South (PCS) indices in publications.” Journal Geophysical Research: Space Physics , 127 e2022JA030355 is based on values the PCS derived at Arctic and Antarctic Research Institute (AARI) authors Comment made available web portal maintained International Service Geomagnetic Indices (ISGI) supported...

Abstract. The only published description of the solar wind sector (SS) term used for reference level in post-event and real-time derivation Polar Cap (PC) indices, PCN (Polar North) PCS South), version endorsed by International Association Geomagnetism Aeronomy (IAGA) is found commented publication, Janzhura Troshichev: Identification IMF structure near-real time ground magnetic data, Annales G...

Abstract Additional datasets from space-based observations of the Earth’s magnetic field are high value to space physics and geomagnetism. The use platform magnetometers non-dedicated satellites has recently successfully provided additional spatial temporal coverage field. Gravity steady-state Ocean Circulation Explorer (GOCE) mission was launched in March 2009 ended November 2013 with purpose ...

Infrared radiation from nitric oxide (NO) at 5.3 µm is a primary mechanism by which the thermosphere cools to space. The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on the NASA Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics satellite has been measuring thermospheric cooling by NO for over 13 years. In this letter we show that the SABER time seri...

We analyze a set of precursory data measured before but compiled in retrospect the MS7.5 Haicheng earthquake February 1975 and MS7.6–7.8 Tangshan July 1976. propose robust simple coarse-graining method that aggregates counts how all anomalies together (levelling, geomagnetism, soil resistivity, earth currents, gravity, stress, well water radon, level) develop as function time. demonstrate stron...

In geomagnetism it is of interest to separate Earth’s core magnetic field from the crustal magnetic field. However, measurements by satellites can only sense the sum of the two contributions. In practice, the measured magnetic field is expanded in spherical harmonics, and separation into crust and core contributions is achieved empirically by a sharp cutoff in the spectral domain. In this paper...