Results 1 to 10 of about 745 (152)

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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Extraordinarily long duration of Eocene geomagnetic polarity reversals [PDF]

Communications Earth & Environment
One 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, Slah Boulila, Futoshi Takahashi, Peter C. Lippert   +3 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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A full sequence of the Matuyama–Brunhes geomagnetic reversal in the Chiba composite section, Central Japan

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, Makoto Okada, Yusuke Suganuma, Takahiro Kitamura   +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, Yiqun Yu, Kun Bai, Jinbin Cao, Yong Wei   +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, Everton S. Medeiros, David Ciro, Daniel Ribeiro Franco, Ricardo I. F. Trindade   +4 more
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A paleomagnetic record of the early Matuyama chron including the Réunion subchron and the onset Olduvai boundary: High-resolution magnetostratigraphy and insights from transitional geomagnetic fields

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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Possible relationship between the Earth’s rotation variations and geomagnetic field reversals over the past 510 Myr

Frontiers in Earth Science, 2015
The Earth’s rotation can change as a result of several internal and external processes, each of which is at a different timescale. Here, we present some possible connections between the Earth’s rotation variations and the geomagnetic reversal frequency ...
Igor Gil Pacca, Everton eFrigo, Gelvam André Hartmann   +2 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, F. Florindo, P. DeMichelis, G. Consolini   +3 more
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Eccentric Dipole Evolution during the Last Reversal, Last Excursions, and Holocene Anomalies. Interpretation Using a 360-Dipole Ring Model

Geosciences, 2021
The eccentric dipole (ED) is the next approach of the geomagnetic field after the generally used geocentric dipole. Here, we analyzed the evolution of the ED during extreme events, such as the Matuyama-Brunhes polarity transition (~780 ka), the Laschamp (
Alicia González-López, María Luisa Osete, Saioa A. Campuzano, Alberto Molina-Cardín, Pablo Rivera, Francisco Javier Pavón-Carrasco   +5 more
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