scholarly journals Concerning the theory of LURR based deterministic earthquake prediction

2021 ◽  
Vol 5 (3) ◽  
pp. 192-222
Author(s):  
Yu.L. Rebetsky ◽  
Keyword(s):  
Lateral Pressure ◽  
Coastal Areas ◽  
Strike Slip ◽  
Earth Tides ◽  
Coulomb Stress ◽  
Island Arcs ◽  
Trigger Effect ◽  
The Earth ◽  
Low Probability ◽  
Main Factor

This paper considers theoretical aspects of a trigger effect of earth tides on earthquake initiation under the LURR approach. The growth of Coulomb stress, which appears resulting from this phenomenon, is shown to occur not for all regimes of stress state acting in the studied region. Its greatest increase corresponds to the regime of the horizontal extension and shear associated with the faults with kinematics of the normal and strike-slip faults. The low level of additional Coulomb stress for the horizontal compression regime allows asserting the low probability of the trigger effect for the faults with kinematics of the reverse faults. It is noted, that there is also an indirect factor in the form of additional pressure caused by the sea tides in addition to the main factor of the earth tides effect on deformations in the solid earth for island arcs and coastal areas of the continental crust. This is an additional vertical pressure for the ocean floor, and a lateral pressure for the crust of island arcs and coastal areas of the continents. Indirect factors significantly complicate the effect of earth tides on the Earth’s crust, completely neutralizing the influence of the direct factor in some cases.

scholarly journals Analisis Pertumbuhan Ekonomi Provinsi Jambi 2012-2019

2020 ◽  
Vol 4 (2) ◽  
pp. 85
Author(s):  
M Yunus ◽  
Novi Mubyarto ◽  
Robi Agustin
Keyword(s):  
Economic Growth ◽  
Economic Activity ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Coefficient Of Determination ◽  
Advantages And Disadvantages ◽  
The Earth ◽  
Growth Economic ◽  
Main Factor

The development achievement of an economic activity can be measured by economic growth. Economic growth will improve if there are activities carried out by humans for the prosperity of the earth and their prosperity. An important factor for increasing economic growth is international trade, one of which is exports. Allah SWT has created in every region and country the advantages and disadvantages. The main factor that also has an influence on the economic development of a country / region is investment activities. Regarding investment in the Al Qur’an, it is clearly stated that investing is a way that is ordered by Allah SWT not to leave the weak generation. In this study, an analysis of the economic growth of the province of Jambi was conducted in 2012-2019. The method used is multiple linear regression analysis. Based on the results of using the R application, there is a significant influence between the export variable and the investment variable on the economic growth variable. The modeling results obtained are Y = 5848.0543 + 0.8886X1 + 0.7929X2. Every increase in exports of 1 billion and investment is considered constant, it will increase economic growth by 0.8886 billion. Every increase in investment of 1 billion and exports are considered constant, it will increase economic growth by 0.7929 billion. The coefficient of determination of 94.06 percent means that the diversity of economic growth variables can be explained by the export and the investment, the remaining 5.94% is explained by other variables not included in the regression model.

scholarly journals ANALYSING POST-SEISMIC DEFORMATION OF IZMIT EARTHQUAKE WITH INSAR, GNSS AND COULOMB STRESS MODELLING

2016 ◽  
Vol XLI-B1 ◽  
pp. 417-421 ◽  
Author(s):  
R. Alac Barut ◽  
J. Trinder ◽  
C. Rizos
Keyword(s):  
Measurement Techniques ◽  
Satellite System ◽  
Northern Region ◽  
Strike Slip ◽  
Coulomb Stress ◽  
North West ◽  
Coulomb Stress Changes ◽  
Izmit Earthquake ◽  
The North ◽  
Stress Changes

On August 17<sup>th</sup> 1999, a M<sub>w</sub> 7.4 earthquake struck the city of Izmit in the north-west of Turkey. This event was one of the most devastating earthquakes of the twentieth century. The epicentre of the Izmit earthquake was on the North Anatolian Fault (NAF) which is one of the most active right-lateral strike-slip faults on earth. However, this earthquake offers an opportunity to study how strain is accommodated in an inter-segment region of a large strike slip fault. In order to determine the Izmit earthquake post-seismic effects, the authors modelled Coulomb stress changes of the aftershocks, as well as using the deformation measurement techniques of Interferometric Synthetic Aperture Radar (InSAR) and Global Navigation Satellite System (GNSS). The authors have shown that InSAR and GNSS observations over a time period of three months after the earthquake combined with Coulomb Stress Change Modelling can explain the fault zone expansion, as well as the deformation of the northern region of the NAF. It was also found that there is a strong agreement between the InSAR and GNSS results for the post-seismic phases of investigation, with differences less than 2mm, and the standard deviation of the differences is less than 1mm.

Fundamental statistical techniques for the analysis of earth tides

1971 ◽  
Vol 61 (1) ◽  
pp. 203-215
Author(s):  
Cheh Pan
Keyword(s):  
Computer Technology ◽  
Earth Tide ◽  
Power Spectra ◽  
Correlation Coefficients ◽  
Earth Tides ◽  
Statistical Techniques ◽  
The Earth ◽  
Tidal Data ◽  
Instrumental Drift ◽  
Phase Differences

abstract Recent advances in instrumentation, digital computer technology and mathematical theory promote the error analysis of Earth-tide data. Various statistical techniques developed and used in other fields are applicable in the study of Earth tides, and the accuracy of the Earth's rigidity constants determined from the tides will be greatly improved with the help of these techniques. The fundamentals of the statistical techniques of autocorrelation, crosscorrelation, convolution, statistical means, bandpass filtering, correlation coefficients, power spectra, coherency and equalization are described, and their principal applications in the Earth-tide analysis summarized. Examples of effective application of these techniques in the elimination of the errors in the tidal data such as those introduced from instrumental drift, phase differences between the observed and predicted tides, etc. are discussed. This work is an attempt to introduce statistical analysis into the Earth-tide study.

scholarly journals On Investigations of the Tidal Waves Mf and Mm

1979 ◽  
Vol 82 ◽  
pp. 315-316
Author(s):  
G. P. Pil'nik
Keyword(s):  
Solid Earth ◽  
Elastic Properties ◽  
Earth Tides ◽  
Love Number ◽  
Astronomical Observations ◽  
Tidal Waves ◽  
The Earth ◽  
Astronomical Time ◽  
Solid Earth Tides

The comparison of astronomical time observations with the theory of solid-Earth tides makes it possible to determine the Love number, k, which characterizes the elastic properties of the Earth. In addition, the comparison of values of k determined from different tidal waves allows us to judge the accuracy of the nutational theory in astronomical observations since both tides and the Earth's nutation are produced by the same causes.

scholarly journals On the link between Earth tides and volcanic degassing

2019 ◽  
Author(s):  
Florian Dinger ◽  
Stefan Bredemeyer ◽  
Santiago Arellano ◽  
Nicole Bobrowski ◽  
Ulrich Platt ◽  
...  
Keyword(s):  
Quantitative Model ◽  
Earth Tides ◽  
Bubble Coalescence ◽  
Magmatic System ◽  
Volcanic Emissions ◽  
Volcanic Gas ◽  
Tidal Variation ◽  
Magma Flow ◽  
Volcanic Degassing ◽  
The Earth

Abstract. Long-term measurements of volcanic gas emissions conducted during the recent decade suggest that under certain conditions the magnitude or chemical composition of volcanic emissions exhibits periodic variations with a period of about two weeks. A possible cause of such a periodicity can be attributed to the Earth tidal potential. The phenomenology of such a link has been debated for long, but no quantitative model has yet been proposed. The aim of this paper is to elucidate whether a causal link from the tidal forcing to variation in the volcanic degassing can be traced analytically. We model the response of a simplified magmatic system to the local tidal gravity variations and derive a periodical vertical magma displacement in the conduit with an amplitude of 0.1–1 m, depending on geometry and physical state of the magmatic system. We find that while the tide-induced vertical magma displacement has presumably no significant direct effect on the volatile solubility, the differential magma flow across the radial conduit profile may result in a significant increase of the bubble coalescence rate in a depth of several kilometres by up to several ten percent. Because bubble coalescence facilitates separation of gas from magma and thus enhances volatile degassing, we argue that the derived tidal variation may propagate to a manifestation of varying volcanic degassing behaviour. The presented model provides a first basic framework which establishes an analytical understanding of the link between the Earth tides and volcanic degassing.

A Pump-Probe Analysis of Nonlinear Elastic Behavior on the San Andreas Fault

2020 ◽  
Author(s):  
Andrew Delorey
Keyword(s):  
San Andreas Fault ◽  
Earth Tides ◽  
Elastic Behavior ◽  
Fracture Networks ◽  
Pump Probe ◽  
San Andreas ◽  
The Earth ◽  
Probe Analysis ◽  
Highly Nonlinear ◽  
Nonlinear Elastic

<p>Fracture networks in the subsurface influence nearly every aspect of earthquakes and natural hazards.  These aspects, including stress, permeability and material failure, and are important for hazard assessment. However, our ability to monitor fracture behavior in the Earth is insufficient for any type of decision-making regarding hazard avoidance.  I propose a new method for probing the evolution of fracture networks in situ to inform public safety decisions and understand natural systems. </p><p>In heterogeneous, fractured materials, like those found in the Earth, the relationship between stress and strain is highly nonlinear.  This nonlinearity in the upper crust is almost entirely due to fractures.  By measuring to what extent Earth materials exhibit nonlinear elastic behavior, we can learn more information about them.  Directly, measuring physical properties may be more useful than just detecting that fractures are present or how they are shaped and oriented.  We measure nonlinearity by measuring the apparent modulus at different strains. </p><p>In this study we use a pump-probe analysis, which involves continuously probing velocity (as a proxy for modulus) while systematically straining the material.  We will use solid Earth tides as a strain pump and empirical Green’s functions (EGF) as a velocity probe.  We apply this analysis to the San Andreas Fault near Parkfield, California.  We chose Parkfield because there is a long-term deployment of borehole seismic instruments that recorded before and after a M6 earthquake.  We find evidence that nonlinear behavior is correlated with the seismic cycle and therefore it may contain information on the both the evolution and current state of stress on faults. </p>

scholarly journals The imprisonment of women in Greek tragedy

1990 ◽  
Vol 110 ◽  
pp. 76-90 ◽  
Author(s):  
Richard Seaford
Keyword(s):  
Greek Tragedy ◽  
The Earth ◽  
The Dead ◽  
The City ◽  
Main Factor

In Kreon's famous edict in Sophokles' Antigone the punishment for attending to the dead Polyneikes is death by public stoning (36). In the event,at the climax of his bitter argument with his son Haimon, who is betrothed to Antigone, Kreon threatens to have Antigone killed in front of Haimon's eyes (760–1). But when Haimon then angrily departs, Kreon orders Antigone to be imprisoned in a deserted place, underground in the rock, with a little food (773–5). Various motives have been suggested for this change of penalty, e.g. that the city may not want to cooperate in the stoning of Antigone. But the main factor must be the aptness of imprisonment underground for the specific case of Antigone. As Kreon himself ironically puts it, ‘there she can ask Hades to save her from death, Hades who is the only god she reveres’ (777–8). Imprisonment underground, in what is described as a tomb, suits the crime of one who has seemed too devoted to Hades, and produces the complementary inversions described by Teiresias (1068–71): the dead Polyneikes is above the earth, while the living Antigone is below, in a tomb.

Polar motion and earth tides from laser tracking

1977 ◽  
Vol 284 (1326) ◽  
pp. 485-494 ◽  
Keyword(s):  
Earth Tides ◽  
Length Of Day ◽  
Laser Tracking ◽  
The Earth ◽  
New Information ◽  
Single Station ◽  
Laser Systems ◽  
Rotation Of The Earth ◽  
Better Than

The tracking of near-Earth satellites with laser systems permits the determination of the variation of latitude of the tracking station and the variation in the rotation of the Earth. The present-day capability of a single station is approximately 75 cm in latitude averaged over 6h and 0.8 ms in the length of day. When the Laser Geodynamics Satellite (Lageos) is launched, a network of laser stations is projected to be able to achieve better than 10 cm in each coordinate from less than one day of tracking. The perturba­tions of near-Earth satellites by solid Earth and ocean tides are now measurable and can provide new information about the Earth and oceans. The orbit perturbations have long periods (days, months) and the analysis of orbital changes are providing estimates of the amplitudes and phases of the major tidal components.

scholarly journals Exomorphogenesis of Cosmogenic Ring Structures of Kazakhstan

2019 ◽  
Vol 12 (1) ◽  
pp. 49-58
Author(s):  
Larysa Veselova ◽  
Khaini-Kamal Kasymkhanova ◽  
Umut Kozhakhmetova ◽  
Roza Bekseitova ◽  
Irina Shmarova ◽  
...  
Keyword(s):  
Practical Importance ◽  
Linear Type ◽  
Erosion Processes ◽  
The Earth ◽  
Crustal Structures ◽  
Ring Structures ◽  
New Type ◽  
Main Factor ◽  
Eastern Kazakhstan

Abstract The use of materials for remote sensing of the Earth made it possible to identify a new type of crustal structures and features of their expression in relief. These are ring structures that complicate the structure of the studied structures of a linear type. As a result of the study of the morphology, geological and tectonic structure of ring structures, it was established that they represent formations of various origins: pluton-volcanic, cosmogenic, and anthropogenic. Cosmogenic structures of different ages and differ in various degrees of transformation. The relief of the identified cosmogenic structures within the limits of the Turan Plains, the Kazakh small hills and mountains of South-Eastern Kazakhstan is transformed by exogenous processes. The defining indicator features of cosmogenic structures include geomorphological, geological, structural tectonic, and also landscape. The degree of change in the initial cosmogenic relief depends on the time of formation, paleogeographic and modern physiographic conditions of the territories. Under the arid conditions of Kazakhstan’s epyhercynian platform, the main factor in the preservation of the “primary” morphology of meteorite craters is the lithologic stratigraphic complexes of the ring shaft. For the studied cosmogenic structures, in particular, the meteorite craters of Saryarka, a distinct geodynamic zoning of the development of exomorphogenesis processes is characteristic. The main exogenous processes include gravity-slope, surface washout, ravine and river erosion, processes of complex denudation and accumulation. The factors and processes of creating a modern crater relief morphology are established. These studies of cosmogenic ring structures of Kazakhstan have not only theoretical significance, revealing the role of cosmogenic processes of the formation of the Earth as a planet, but also have immediate practical importance. Meteorite craters are indicators of mineral deposits.

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