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The behaviour of the geomagnetic field characteristics (mean values of the paleointensity, amplitude of its variations and reversal frequency) during the last 170 million years was analyzed. It was found that the mean values of the…

Geophysics · Physics 2007-07-02 A. Yu. Kurazhkovskii , N. A. Kurazhkovskaya , B. I. Klain

The results of paleointensity determinations of the geomagnetic field, which are obtained by sedimentary rocks in the Middle Jurassic - Neogene (167-12) Ma, are summarized. It was found that in the interval (167-67) Ma (Middle Jurassic -…

Geophysics · Physics 2017-07-28 A. Yu. Kurazhkovskii , N. A. Kurazhkovskaya , B. I. Klain

Behavior of the geomagnetic field intensity in the Paleogene from sedimentary rocks of the Russian Plate was investigated. It is revealed that in the beginning of the Paleogene alternating of paleointensity variations of little amplitude…

Geophysics · Physics 2015-06-15 A. Yu. Kurazhkovskii , N. A. Kurazhkovskaya , B. I. Klain

The present paper summarizes results of the studies on the intensity of geomagnetic field in the (167 - 23) Ma interval by sedimentary rocks of the Russian Plate and adjacent territories. The joint analysis of the data paleointensity…

Geophysics · Physics 2014-10-03 A. Yu. Kurazhkovskii , N. A. Kurazhkovskaya , B. I. Klain

Quasi-periodic changes of the paleointensity and geomagnetic polarity in the intervals of 170 Ma to the present time and of 550 Ma to the present time were studied, respectively. It is revealed that the spectrum of the basic variations in…

Geophysics · Physics 2021-06-22 A. Yu. Kurazhkovskii , N. A. Kurazhkovskaya , B. I. Klain

Field reversals are the most spectacular changes in the geomagnetic field but remain little understood. Paleomagnetic data primarily constrain the reversal rate and provide few additional clues. Reversals and excursions are characterized by…

Earth and Planetary Astrophysics · Physics 2016-09-21 Johannes Wicht , Domenico Meduri

The Jovian magnetosphere is complicated by the multiple plasma sources and ion species present within it, as well as fast rotation with its dipole axis titled from its rotational axis. To date global models of Jovian have neglected the…

Earth and Planetary Astrophysics · Physics 2016-07-11 Robert M. Winglee , Erika M. Harnett

Solar wind-magnetosphere coupling, its causes and consequences have been studied for the last several decades. However, the assessment of continuously changing behaviour of the sun, plasma and field flows in the interplanetary space and…

Solar and Stellar Astrophysics · Physics 2013-12-09 Badruddin , O. P. M. Aslam

Numerical simulations have shown that the strength of planetary magnetic fields depends on the convective energy flux emerging from planetary interiors. Here we model the interior structure of gas giant planets using \texttt{MESA}, to…

Earth and Planetary Astrophysics · Physics 2024-11-13 Konstantinos Kilmetis , Aline A. Vidotto , Andrew Allan , Daria Kubyshkina

After describing all the contradictions associated with the current Plate Tectonics theory, this paper proposes a model where a single cause can explain all geophysical and geological phenomena. The source of the Earth's activity lies in…

Geophysics · Physics 2016-08-16 André Rousseau

A new mechanism for the evolution of primordial magnetic fields is described and analysed. The field evolution is followed from the time of its creation until the epoch of structure and galaxy formation. The mechanism takes into account the…

Astrophysics · Physics 2009-10-28 K. Dimopoulos , A. C. Davis

We present a combined observational and theoretical analysis to investigate the nature of plasma turbulence at kinetic scales in the Earth's magnetosheath. In the first decade of the kinetic range, just below the ion gyroscale, the…

Space Physics · Physics 2017-06-27 C. H. K. Chen , S. Boldyrev

Plasma in the earth's magnetosphere is subjected to compression during geomagnetically active periods and relaxation in subsequent quiet times. Repeated compression and relaxation is the origin of much of the plasma dynamics and…

Plasma Physics · Physics 2020-08-19 Gurudas Ganguli , Chris Crabtree , Alex Fletcher , Bill Amatucci

Primordial magnetic fields could explain the large-scale magnetic fields present in the Universe. Inflation and phase transitions in the early Universe could give rise to such fields with unique characteristics. We investigate the…

We study the radial evolution of intermittency of density fluctuations in the fast solar wind. The study is performed analyzing the plasma density measurements provided by Helios 2 in the inner heliosphere between $0.3$ and $0.9$ AU. The…

Solar and Stellar Astrophysics · Physics 2014-11-14 R. Bruno , D. Telloni , L. Primavera , E. Pietropaolo , R. D'Amicis , L. Sorriso-Valvo , V. Carbone , F. Malara , P. Veltri

Plasma in the terrestrial magnetosheath is characterised by very weak particle-particle collisions, so kinetic microinstabilities are thought to be responsible for regulating the thermodynamics of the plasma. By exciting electromagnetic…

Earth's climate can be understood as a dynamical system that changes due to external forcing and internal couplings. Essential climate variables, such as surface air temperature, describe this dynamics. Our current interglacial, the…

Atmospheric and Oceanic Physics · Physics 2022-01-24 Beatrice Ellerhoff , Kira Rehfeld

We present and analyze FUSE observations of six solar analogs. These are single, main-sequence G0-5 strs selected as proxies for the Sun at several stages of its main-sequence lifetime. The emission features in the FUSE 920-1180 A…

Astrophysics · Physics 2009-11-07 Edward F. Guinan , Ignasi Ribas , Graham M. Harper

The onset and nature of the earliest geomagnetic field is important for understanding the evolution of the core, atmosphere and life on Earth. A record of the early geodynamo is preserved in ancient silicate crystals containing minute…

Earth and Planetary Astrophysics · Physics 2015-02-17 John A. Tarduno , Eric G. Blackman , Eric E. Mamajek

Magnetic activity changes the gravito-acoustic modes of solar-like stars and in particular their frequencies. There is an angular-degree dependence that is believed to be caused by the non-spherical nature of the magnetic activity in the…

Solar and Stellar Astrophysics · Physics 2019-06-26 F. Perez Hernandez , R. A. Garcia , S. Mathur , A. R. G. Santos , C. Regulo
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