Journal ArticleDOI
Basic magnetic properties of rocks under the effects of mechanical stresses
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TLDR
In this article, the effects of mechanical stresses on the magnetization of the earth's crust can be classified in two categories: (a) the reversible effect which disappears when the stress is removed; and (b) the irreversible effect which causes an irreversible enhancement or an irreversible demagnetization of remanent magnetization.About:
This article is published in Tectonophysics.The article was published on 1970-03-01. It has received 103 citations till now. The article focuses on the topics: Remanence & Magnetization.read more
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Experimental deformation of synthetic magnetite-bearing calcite sandstones: Effects on remanence, bulk magnetic properties, and magnetic anisotropy
TL;DR: In this paper, the effects of experimental deformation on the magnetic properties of a set of synthetic calcite sandstone samples containing magnetite were quantified in a microcomputer-controlled apparatus that adjusted the applied differential stress as needed to maintain a constant strain rate of 10−5 s−1.
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Eruption mechanism as inferred from geomagnetic changes with special attention to the 1989–1990 activity of Aso volcano
TL;DR: In this paper, the authors detected magnetic changes associated with volcanic activity of Aso volcano with a dense network of continuously recording proton-precession magnetometers during the period from June 1989 to June 1990 Magnetic date clearly indicate that changes in the magnetization within the volcano are most probably caused by temperature changes.
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The effect of uniaxial compression on the initial susceptibility of rocks as a function of grain size and composition of their constituent titanomagnetites
TL;DR: In this paper, an ac bridge method was used to study the effect of uniaxial compression on the initial magnetic susceptibility of separated titanomagnetites, and the results indicated that the impact of pressure on susceptibility decreases with decreasing grain size, not in a continuous manner but rather depending upon whether the dominant magnetic grain size is multidomain, pseudo single-domain or single domain.
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Seismomagnetic Observation During the 8 July 1986 Magnitude 5.9 North Palm Springs Earthquake
M. J. S. Johnston,R. J. Mueller +1 more
TL;DR: Seismomagnetic offsets of 1.2 and 0.3 nanotesla were observed at epicentral distances after the 8 July 1986 magnitude 5.9 North Palm Springs earthquake, the first obtained of this elusive but long-anticipated effect.
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Domain wall nucleation as a controlling factor in the behaviour of fine magnetic particles in rocks
TL;DR: In this article, it is suggested that much of the grain size dependence of magnetic behavior in the pseudosingle domain grain size range can be attributed to the increasing difficulty with which walls are nucleated, as particle size decreases.
References
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Journal ArticleDOI
The seismomagnetic effect
TL;DR: In this article, the authors calculate local variations in the geomagnetic field, which are produced by stress changes in crustal rocks, from the stress patterns and the piezomagnetic properties of the rocks down to the Curie point isotherm.
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Earthquake Energy, Earthquake Volume, Aftershock Area, and Strength of the Earth's Crust
TL;DR: In this article, the authors deduced the energy of the largest possible earthquake from the spatial distribution of the stress energy within the earth's crust, which was then combined with the magnitude energy relation due to GUTENBERG and RICHTER, yielding a formulaE=6×102×A1·5.
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Effects of Uniaxial Compression on Remanent Magnetization
Mitiyasu Ohnaka,Hajimu Kinoshita +1 more
TL;DR: In this article, the effect of directional stress on the remanent magnetization of magnetite bearing rocks and nickel polycrystallites was investigated and a nearly reversible change in intensity was found when the direction of compression is perpendicular to that of TRM.
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The effect of stress on the susceptibility and magnetization of a partially magnetized multidomain system
TL;DR: In this article, a model for partial magnetization of an isotropic multidomain magnetic system was proposed and the behavior of the model system in response to applied stress was analyzed.
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Theory of the magnetic susceptibility of stressed rock
TL;DR: In this paper, the authors calculated the stress dependence of magnetic susceptibility of igneous rock from the multidomain theory of magnetic grains, assuming that the magnetic mineral is pure magnetite whose saturation magnetization, magnetocrystalline anisotropy and saturation magnetostriction are known.