Geophysics

1904 Submissions

[5] viXra:1904.0560 [pdf] submitted on 2019-04-28 06:46:06

Collection of Exercises and Problems of Topography, Astronomy, Geodesy and Least Squares Theory

Authors: Abdelmajid Ben Hadj Salem
Comments: 70 Pages. In French.

I have often received students in geomatic requests asking me to provide them with exercises or problems of geodesy, topography, astronomy or the application of the theory of least squares. The paper is a collection of exercises and problems that comes to fill the need of the students in this matter.
Category: Geophysics

[4] viXra:1904.0431 [pdf] submitted on 2019-04-22 12:09:56

Short-Term Prognosis of Strong Earthquakes and Volcanic Eruptions According to Daily Indexis of Solar Activity

Authors: A.M.Eigenson, I.B.Bazylevych, M.S.Shevchenko
Comments: 1 Page.

Recently one of the authors [1-6] has shown that when solar activity curve begins to go down, then in the vicinity of it's minimum earthquakes and volcanic eruptions occur. Analysis of data during the period 2010-2018 shows that the probability of false prognosis is no more 2 %. This feature could be used for forecasting these terrestrial events several days in advance. The "opposite" Forbush effect is proposed as possible reason for explanation of this phenomena. In our days, we see from Fig. 1 that the dangerous area lies between April 22 and May 2, 2019. (Addition: earthquakes 6+ are noted as circle’s, earthquakes 7+ as ellipsis and volcanic eruptions as crosses).
Category: Geophysics

[3] viXra:1904.0349 [pdf] submitted on 2019-04-17 07:37:55

Numerical Solution of Master Equation Corresponding to Schumann Waves

Authors: Victor Christianto, Florentin Smarandache
Comments: 7 Pages. This paper has not been submitted to a journal. Comments are welcome

Following a hypothesis by Marciak-Kozlowska, 2011, we consider one dimensional Schumann wave transfer phenomena. Numerical solution of that equation was obtained by the help of Mathematica.
Category: Geophysics

[2] viXra:1904.0323 [pdf] submitted on 2019-04-16 11:59:07

Attractions of the Sun and the Moon on The Earth

Authors: Abdelmajid Ben Hadj Salem
Comments: 6 Pages. In French.

This note gives the elements on the attraction of the sun and the moon. It was inspired by the reading of the book by Helmut Moritz and Ivan I. Muller entitled Earth Rotation: Theory and Observation which can be a tidal introductory course. \\ It includes the following chapters: - The lunar-solar tidal potential. - Zonal, sectoral and tesseral terms
Category: Geophysics

[1] viXra:1904.0221 [pdf] replaced on 2019-04-12 08:42:52

Report of Spatial Geodesy on the Rapid Implementation of a Unified Geodetic System in Africa

Authors: Fezzani Chedly, Abdelmajid Ben Hadj Salem
Comments: 13 Pages. It is a numerical edition of the original paper dedicated to the memory of the first author who passed away on March 09, 2019. In French.

Having a unified reference system, established on a universally accepted and utilitarian basis, is an important contribution to the judicious use of geographic information to promote Africa's economic development at the national level, regional and continental. To do so, it is important today to make the best use of space technologies and to assimilate them, especially through Cartographic National Institutions. This paper: - is written for small African mapping institutions, - defines the organizational prerequisites for rapidly implementing the Unified Reference System at the continental level. - serves as a framework to guide the debate on the real questions to be asked in this area.
Category: Geophysics