单词	geomagnetism
释义	geomagnetism /dʒiːə(ʊ)ˈmaɡnɪtɪz(ə)m / noun [mass noun] The branch of geology concerned with the magnetic properties of the earth.It was while considering the behaviour of the magnetic fields of the Sun and the Earth that be became interested in geomagnetism and palaeomagnetism.... It was the beginning of the modern era of geomagnetism and geophysics. One wonders if the same will happen to other lines of research, such as attempts to replicate, extend, and understand the correlations between ESP and geomagnetism. Derivatives geomagnetic /dʒiːə(ʊ)maɡˈnɛtɪk / adjective ... It records a mixed polarity pattern that corresponds to the mixed nature of the Early Cambrian geomagnetic field. The determination of geomagnetic polarities in volcanic sequences was carried out in the field using portable fluxgate magnetometers. The inner ear's structure and contents is thought to permit the shark to determine and distinguish sounds and the geomagnetic fields of the earth's magma. geomagnetically /dʒiːə(ʊ)maɡˈnɛtɪk(ə)li/ adverb ... Enhanced ionospheric electric fields are present near the mid to high-latitudes during geomagnetically disturbed periods, which can lead to depletions and enhancements of electron density in this region. As the magnetic storm raged through the night, huge geomagnetically induced currents surged through the wires and cables. Besides a direct contribution to corrosion, geomagnetically induced pipe-to-soil voltages are a nuisance when measuring cathodic protection parameters and making control surveys.
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