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Regionally-triggered geomagnetic reversals [PDF]
Scientific ReportsSystematic 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
Filipe Terra-Nova, Hagay Amit
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Motonori Matuyama and reversals of geomagnetic field [PDF]
Proceedings of the Japan Academy. Series B, Physical and Biological SciencesIn 1929, Matuyama published his paper on the magnetization of mostly Quaternary volcanic rocks. In this paper, he described the results of paleomagnetic measurements of volcanic rocks from Japan and nearby areas and concluded that the latest transition ...
Masaru KONO
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Deciphering records of geomagnetic reversals [PDF]
Reviews of Geophysics, 2016 Polarity reversals of the geomagnetic field are a major feature of the Earth's dynamo. Questions remain regarding the dynamical processes that give rise to reversals and the properties of the geomagnetic field during a polarity transition. A large number of paleomagnetic reversal records have been acquired during the past 50 years in order to better ...
Jean-Pierre Valet, Alexandre Fournier
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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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Late Cambrian geomagnetic instability after the onset of inner core nucleation [PDF]
Nature Communications, 2023 The Ediacaran Period marks a pivotal time in geodynamo evolution when the geomagnetic field is thought to approach the weak state where kinetic energy exceeds magnetic energy, as manifested by an extremely high frequency of polarity reversals, high ...
Yong-Xiang Li +7 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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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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MECHANISM OF GEOMAGNETIC JERKS [PDF]
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2017 Mechanism of geomagnetic jerks evident from the model of the hot Earth magnetic field is discussed here. Similar in their principle, reversals, excursions and jerks result from auto adjusting of temperature of the phase change (PC) “evaporation ...
V.V. Kuznetsov
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“Tiny Wiggles” in the Late Miocene Red Clay Deposits in the North‐East of the Tibetan Plateau
Geophysical Research Letters, 2021 Small amplitude or short period geomagnetic anomalies known as “tiny wiggles” (TWs) are often hard to identify because of magnetic signal smoothing in the marine record of geomagnetic reversals.
Rui Zhang +11 more
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Reversals in the large-scale αΩ-dynamo with memory [PDF]
Nonlinear Processes in Geophysics, 2015 Inversion of the magnetic field in a model of large-scale αΩ-dynamo with α-effect with stochastic memory is under investigation. The model allows us to reproduce the main features of the geomagnetic field reversals.
L. K. Feschenko, G. M. Vodinchar
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