scholarly journals The Potential Impacts of the Erratic Motion of Dip Equator and Magnetic Poles

2020 ◽  
Vol 125 (8) ◽  
Author(s):  
Endawoke Yizengaw
Keyword(s):  
Dip Equator ◽  
Erratic Motion ◽  
Magnetic Poles

scholarly journals Influence of uncertainties of the empirical models for inferring the E-region electric fields at the dip equator

2016 ◽  
Vol 68 (1) ◽  
Author(s):  
Juliano Moro ◽  
Clezio Marcos Denardini ◽  
Laysa Cristina Araújo Resende ◽  
Sony Su Chen ◽  
Nelson Jorge Schuch
Keyword(s):  
Electric Fields ◽  
Empirical Models ◽  
E Region ◽  
Dip Equator

Search for Tracks of Massive, Multiply Charged Magnetic Poles

1969 ◽  
Vol 184 (5) ◽  
pp. 1398-1401 ◽  
Author(s):  
R. L. Fleischer ◽  
P. B. Price ◽  
R. T. Woods
Keyword(s):  
Multiply Charged ◽  
Magnetic Poles

scholarly journals On the present situation of the magnetic lines of equal variation, and their changes on the ter­restrial surface

1837 ◽  
Vol 3 ◽  
pp. 195-196
Keyword(s):  
Present Situation ◽  
The Earth ◽  
Actual Observation ◽  
Magnetic Variation ◽  
Magnetic Poles ◽  
Natural Situation

The author has undertaken the task of collecting and arranging all the authentic information respecting magnetic variation which has been recorded in the accounts of several recent voyages and journeys of discovery. The inconvenience from the distortion and interruptions of the lines of equal variation laid down on maps or charts, induced him to trace them on a globe, where they can, of course, be exhibited in their natural situation, and in regular conti­nuity : and he has been careful to mark only such as are deduced from actual observation. The examination of the lines thus laid down shows them to be dependent on definite and general laws, and not on local influences ; their inflexions and curvatures presenting systems of great regularity, and being exempt from those abrupt and angular configurations which such local disturbances might be expected to produce : neither do they appear to be consistent with the hypothesis of the action of a certain definite plurality of magnetic poles. The author next offers some observations on the progressive changes which these lines undergo in their places and configurations, and shows their agreement with the hypothesis of a revolution of the mag­netic poles for each place round the poles of the earth; each respective place having its own particular pole, the revolving motion of which is regulated by some general but hitherto unknown law.

scholarly journals Influence of high-latitude geomagnetic pulsations on recordings of broadband force-balanced seismic sensors

2012 ◽  
Vol 1 (2) ◽  
pp. 85-101 ◽  
Author(s):  
E. Kozlovskaya ◽  
A. Kozlovsky
Keyword(s):  
Magnetic Field ◽  
Geomagnetic Field ◽  
Geomagnetic Latitude ◽  
Low Frequency ◽  
Auroral Oval ◽  
Polar Regions ◽  
Geomagnetic Pulsations ◽  
Seismic Sensors ◽  
Magnetic Poles ◽  
Magnetic Disturbances

Abstract. Seismic broadband sensors with electromagnetic feedback are sensitive to variations of surrounding magnetic field, including variations of geomagnetic field. Usually, the influence of the geomagnetic field on recordings of such seismometers is ignored. It might be justified for seismic observations at middle and low latitudes. The problem is of high importance, however, for observations in Polar Regions (above 60° geomagnetic latitude), where magnitudes of natural magnetic disturbances may be two or even three orders larger. In our study we investigate the effect of ultra-low frequency (ULF) magnetic disturbances, known as geomagnetic pulsations, on the STS-2 seismic broadband sensors. The pulsations have their sources and, respectively, maximal amplitudes in the region of the auroral ovals, which surround the magnetic poles in both hemispheres at geomagnetic latitude (GMLAT) between 60° and 80°. To investigate sensitivity of the STS-2 seismometer to geomagnetic pulsations, we compared the recordings of permanent seismic stations in northern Finland to the data of the magnetometers of the IMAGE network located in the same area. Our results show that temporary variations of magnetic field with periods of 40–150 s corresponding to regular Pc4 and irregular Pi2 pulsations are seen very well in recordings of the STS-2 seismometers. Therefore, these pulsations may create a serious problem for interpretation of seismic observations in the vicinity of the auroral oval. Moreover, the shape of Pi2 magnetic disturbances and their periods resemble the waveforms of glacial seismic events reported originally by Ekström (2003). The problem may be treated, however, if combined analysis of recordings of co-located seismic and magnetic instruments is used.

Novel synthesis of 1,5-disubstituted-1,2,3-triazolines catalysed by Zepto magnetic microspheres under the influence of a rotating magnetic field

2019 ◽  
Vol 97 (3) ◽  
pp. 163-168 ◽  
Author(s):  
Priyanka Sharma ◽  
Srinivasu V. Vallabhapurapu ◽  
Wei H. Ho ◽  
Nanjundaswamy M. Hemmaragala
Keyword(s):  
Magnetic Field ◽  
Magnetic Force ◽  
Rotating Magnetic Field ◽  
Magnetic Microspheres ◽  
The Novel ◽  
Aryl Azides ◽  
Alkyl Aryl ◽  
Novel Synthesis ◽  
Bead Diameter ◽  
Magnetic Poles

The novel reactor has been designed to perform chemical reactions under the influence of a magnetic field generated by alternating magnetic poles as a function of time. The system was successfully employed to synthesize a series of 1,5-disubstituted-1,2,3-triazolines via the regioselective [3 + 2] cycloaddition reactions between alkyl/aryl azides and nitroolefins catalysed by Zepto (para magnetic ultra-blue carboxy functionalized) microspheres (bead diameter 2.5 μm). All of the reactions went smoothly without any adverse effect on nitro, cyano, thienyl, hydroxy, halogens, and ether functions at 25 ± 2 °C and afforded 82%–99% pure products at a magnetic field of 18.99 mT and an exposure time of 180–240 min. The influence of the magnetic force exerted on the magnetic materials was found to enhance the catalytic activity of microspheres. The catalyst could easily be separated by simple centrifugation, which could be reused for at least 15 runs with no loss in activity.

scholarly journals Tectonomagnetic modeling based on the piezomagnetism: a review

2001 ◽  
Vol 44 (2) ◽  
Author(s):  
Y. Sasai
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Function Method ◽  
Ground Surface ◽  
3D Models ◽  
Analytic Solutions ◽  
Surface Integral ◽  
Green’S Function Method ◽  
Magnetic Poles ◽  
2D And 3D

Development of tectonomagnetic modeling on the basis of the piezomagnetic effect is reviewed for the period since the early 1990's. First, the basic theory is briefly summarized, in which the representation theorem or the surface integral representation for the piezomagnetic potential and the Green's function method are presented. In the 1990's, several field observations in earthquakes and volcanoes were interpreted with the aid of analytic solutions based on the Green's function method. A general formula was developed for an inclined rectangular fault with strike-slip, dip-slip and tensile faulting. The surface integral method has been applied to 2D and 3D models, as well as to fault models in the inhomogeneously magnetized crust. When the magnetic field is measured within a bore hole, the effect of magnetic poles around the hole should be taken into account. As a result, tectonomagnetic signals are much enhanced in a bore hole compared with on the ground surface. Finally, piezomagnetic field changes associated with the Parkfield fault model are introduced and the new aspect of the model is discussed.

E region electric fields at the dip equator and anomalous conductivity effects

2013 ◽  
Vol 51 (10) ◽  
pp. 1857-1869 ◽  
Author(s):  
C.M. Denardini ◽  
H.C. Aveiro ◽  
J.H.A. Sobral ◽  
J.V. Bageston ◽  
L.M. Guizelli ◽  
...  
Keyword(s):  
Electric Fields ◽  
E Region ◽  
Dip Equator

scholarly journals HIDDEN DIRAC MONOPOLES

2008 ◽  
Vol 23 (24) ◽  
pp. 4023-4037 ◽  
Author(s):  
VICENTE VENTO
Keyword(s):  
Electric Charge ◽  
Particle Physics ◽  
Magnetic Pole ◽  
Experimental Search ◽  
Grand Unified Theories ◽  
Unified Theories ◽  
Discrete Nature ◽  
Magnetic Poles ◽  
The Universe

Dirac showed that the existence of one magnetic pole in the universe could offer an explanation of the discrete nature of the electric charge. Magnetic poles appear naturally in most grand unified theories. Their discovery would be of greatest importance for particle physics and cosmology. The intense experimental search carried thus far has not met with success. I propose a universe with magnetic poles which are not observed free because they hide in deeply bound monopole–antimonopole states named monopolium. I discuss the realization of this proposal and its consistency with known cosmological features. I furthermore analyze its implications and the experimental signatures that confirm the scenario.

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