Results 1 to 10 of about 735 (194)
Geomagnetic reversal rates following Palaeozoic superchrons have a fast restart mechanism [PDF]
Nature Communications, 2016 The mechanism behind the initiation and termination of superchrons remains unclear. Here, the author provides insight into Palaeozoic superchrons, showing that the 10 million year interal adjacent to each superchron is characterized by asymmetry in ...
Mark W. Hounslow
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Regionally-triggered geomagnetic reversals. [PDF]
Sci RepAbstractSystematic studies of numerical dynamo simulations reveal that the transition from dipole-dominated non-reversing fields to models that exhibit reversals occurs when inertial effects become strong enough. However, the inertial force is expected to play a secondary role in the force balance in Earth’s outer core.
Terra-Nova F, Amit H.
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Extraordinarily long duration of Eocene geomagnetic polarity reversals [PDF]
Communications Earth & EnvironmentOne of the most intriguing attributes of Earth’s magnetic field is that it reverses polarity. Previous palaeomagnetic records mainly from the last ~17 million years indicate that the reversal process typically occurs over ten thousand or fewer years ...
Yuhji Yamamoto +3 more
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Influence of Solar Wind High‐Speed Streams on the Brazilian Low‐Latitude Ionosphere During the Descending Phase of Solar Cycle 24 [PDF]
Space WeatherThis study investigates the Brazilian low‐latitude ionospheric response to CIR/HSS‐driven geomagnetic storms during the declining phase of solar cycle 24, from 2016 to 2017.
S. P. Moraes‐Santos +7 more
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Toward a possible next geomagnetic transition? [PDF]
Natural Hazards and Earth System Sciences, 2013 The geomagnetic field is subject to possible reversals or excursions of polarity during its temporal evolution. Considering that: (a) in the last 83 million yr the typical average time between one reversal and the next (the so-called chron) is around 400
A. De Santis, E. Qamili, L. Wu
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Progress in Earth and Planetary Science, 2020 Geological records of the Matuyama–Brunhes (M–B) geomagnetic reversal facilitate the development of an age model for sedimentary and volcanic sequences and help decipher the dynamics of the Earth’s magnetic field.
Yuki Haneda +3 more
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On the Particle Motion in Paleo‐Magnetosphere During the Geomagnetic Polarity Reversal
Geophysical Research Letters, 2023 During the Earth's magnetic reversal, the dipole component of the magnetic field weakens, and the non‐dipole component becomes dominant, resulting in a far more complex magnetospheric topology than that of a dipole.
Fan Gong +4 more
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Geomagnetic reversals at the edge of regularity
Physical Review Research, 2021 Geomagnetic field reversals remain as one of the most intriguing problems in geophysics and are regarded as chaotic processes resulting from a dynamo mechanism.
Breno Raphaldini +4 more
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Progress in Earth and Planetary Science, 2020 We present a novel paleomagnetic record for the lower Matuyama chronozone, which includes the Réunion subchronozone and the lower Olduvai polarity reversal, from a continuous section of a 168-m-thick on-land marine succession in the southernmost part of ...
Takumi Konishi, Makoto Okada
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Unveiling Geomagnetic Reversals: Insights From Tipping Points Theory
Geophysical Research Letters, 2023 The geomagnetic field shows aperiodic reversals and excursions separated by stable polarity periods. Although the exact mechanisms responsible of reversals are still debated, several models of different complexity have been proposed. Here we use, for the
T. Alberti +3 more
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