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Mapping the Earth’s magnetic field – to find oil, track storms or probe the planet ’s interior – typically requires expensive satellites. University of California , Berkeley, physicists have now come up with a much cheaper way to measure the Earth’s magnetic field using only a ground-based laser.
Tags: ads-by-google, astronomy, california, geology-news, Geology.com, magnetic-field, mexico, middle-east, north, satellite imagesReversals of Earth’s magnetic field occur about once every 200,000 years and require a few thousand years to slowly change. A Reuters article describes one reversal that occurred very fast.
Tags: africa, earth sciences, geology, Geology.com, geophysics, historical geology, magnetic, magnetic-field, mexico, michigan, north, plate-tectonics, united-states, university, virginiaAn article that explores what NASA scientists are learning about Earth’s core and magnetic field using indirect measurements taken on land, on the oceans and from space.
Tags: africa, australia, earth sciences, europe, Geology.com, historical geology, magnetic, magnetic-field, michigan, national, pennsylvania, plate-tectonics, virginia, washington