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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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Deciphering records of geomagnetic reversals. [PDF]
Rev Geophys, 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
Valet JP, Fournier A.
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On the biospheric effects of geomagnetic reversals. [PDF]
Natl Sci Rev, 2023 This perspective argues an evolutionary effect of geomagnetic field reversals on life and highlights the urgency of multidisciplinary studies on the linkage between Earth's magnetic field and biosphere.
Pan Y, Li J.
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Geomagnetic reversals at the edge of regularity [PDF]
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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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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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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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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Tektites and Geomagnetic Reversals
Scientific American, 1967 THE microscopic glassy objects which occur in sediments deposited in the Australasian area during and shortly after the last magnetic polarity reversal are apparently tektites (see succeeding communication). The last reversal occurred 0.7 × 106 yr ago: potassium–argon dates1 indicate that the Australasian tektites were formed 0.7 × 106 yr ago.
B. Glass, B. Heezen
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, 2021 Convection in Earth’s georeactor sub-shell is responsible for generating the geomagnetic field and for maintaining the critical balances necessary for stable sub-core nuclear fission. External factors capable of disrupting sub-shell convection are trauma
J. Herndon
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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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