Variation in the rotation rate of the earth and the geomagnetic field

2007 ◽  
Vol 42 (4) ◽  
pp. 433-448 ◽  
Author(s):  
P. Varga ◽  
Z. Bus ◽  
B. Süle ◽  
A. Schreider ◽  
C. Bizouard ◽  
...  
Keyword(s):  
Rotation Rate ◽  
Geomagnetic Field ◽  
The Earth

scholarly journals Eigenmode analysis of ballooning perturbations in the inner magnetosphere of the Earth

2007 ◽  
Vol 25 (6) ◽  
pp. 1391-1403 ◽  
Author(s):  
A. S. Parnowski
Keyword(s):  
Stability Criterion ◽  
Geomagnetic Field ◽  
Finite Conductivity ◽  
Nonlinear Structures ◽  
Magnetic Hydrodynamics ◽  
Longitudinal Displacement ◽  
Inner Magnetosphere ◽  
Transversal Displacement ◽  
The Earth ◽  
Eigenmode Analysis

Abstract. We analyze coupled Alfvén and slow magnetosonic eigenmodes in a dipole geomagnetic field with different ionospheric conductivities in the framework of ideal magnetic hydrodynamics (MHD) with finite pressure. We use numerical and, if possible, analytical methods to describe eigenmode frequencies, growth rates and eigenfunctions. The spectrum of Alfvén and slow magnetosonic modes is discrete and equidistant. The frequencies of the first Alfvén and slow magnetosonic eigenmodes are estimated as ~1 Hz and ~1 mHz, respectively. In the case of finite conductivity, periodic and aperiodic modes are separated and their interaction analyzed. It was shown that periodic and aperiodic perturbations can mutually transform into each other. A new flute stability criterion is derived (α~4.25), which is stricter than the Gold criterion (α=20/3). Here, as usual, α=−L/p dp/dL. For flute perturbations, the deviations of transversal displacement from a constant are calculated. An approximation for longitudinal displacement is derived. We determined the position of the main longitudinal peak, which can be responsible for nonlinear structures observed by Freja. An influence of nonlinear terms in pressure is estimated as well.

AN ANALYTICAL SOLUTION OF THE COSMIC RAYS TRANSPORT EQUATION IN THE PRESENCE OF THE GEOMAGNETIC FIELD

2002 ◽  
Vol 17 (12n13) ◽  
pp. 1645-1653
Author(s):  
MARINA GIBILISCO
Keyword(s):  
Magnetic Field ◽  
Cosmic Rays ◽  
Analytical Solution ◽  
Transport Equation ◽  
Geomagnetic Field ◽  
The Earth ◽  
Factorization Technique ◽  
Diffusion Motion ◽  
Geomagnetic Fields ◽  
The Magnetic Field

In this work, I study the propagation of cosmic rays inside the magnetic field of the Earth, at distances d ≤ 500 Km from its surface; at these distances, the geomagnetic field deeply influences the diffusion motion of the particles. I compare the different effects of the interplanetary and of the geomagnetic fields, by also discussing their role inside the cosmic rays transport equation; finally, I present an analytical method to solve such an equation through a factorization technique.

Reducing the negative impact of changes in space weather on human condition

2019 ◽  
pp. 236-239
Author(s):  
E. V. Martysh
Keyword(s):  
Human Body ◽  
Space Weather ◽  
Geomagnetic Field ◽  
High Efficiency ◽  
Negative Impact ◽  
The State ◽  
Human Condition ◽  
Physical Factors ◽  
Plasma Medicine ◽  
The Earth

In the article, based on the analysis of the physical factors responsible for the parameters of space weather near the Earth, possible ways of influence of the geomagnetic field disturbances on the state of the human body and methods of untraditional medicine to prevent the negative impact of such disturbances, the conclusions about the possibility of using acupuncture in the prevention and elimination of such influence are made. and the ability to use plasma medicine to address these problems with high efficiency.

Long-term changes in the rotation rate of the Earth

1973 ◽  
Vol 9 (3) ◽  
pp. 259-274 ◽  
Author(s):  
Colin T. Scrutton ◽  
Roger G. Hipkin
Keyword(s):  
Rotation Rate ◽  
The Earth ◽  
Long Term Changes

scholarly journals The INGV tectonomagnetic network: 2004–2005 preliminary dataset analysis

2006 ◽  
Vol 6 (5) ◽  
pp. 773-777 ◽  
Author(s):  
F. Masci ◽  
P. Palangio ◽  
A. Meloni
Keyword(s):  
Local Field ◽  
Geomagnetic Field ◽  
Central Italy ◽  
The Other ◽  
Intensity Data ◽  
National Network ◽  
The Earth ◽  
Complete Dataset ◽  
Dataset Analysis ◽  
Geomagnetic Anomalies

Abstract. It is well established that earthquakes and volcanic eruption can produce small variations in the local geomagnetic field. The Italian Istituto Nazionale di Geofisica e Vulcanologia (INGV) tectonomagnetic network was installed in Central Italy since 1989 to investigate possible effects on the local geomagnetic field related to earthquakes occurrences. At the present time, total geomagnetic field intensity data are collected in four stations using proton precession magnetometers. We report the complete dataset for the period of years 2004–2005. The data of each station are differentiated respect to the data of the other stations in order to detect local field anomalies removing the contributions from the other sources, external and internal to the Earth. Unfortunately, no correlation between geomagnetic anomalies and the local seismic activity, recorded in Central Italy by the INGV Italian Seismic National Network, was found in this period. Some deceptive structures present in the differentiated data are pointed out.

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