Results 21 to 30 of about 471 (192)

Two Records of Relative Paleointensity for the Past 4 Myr

Frontiers in Earth Science, 2020
We performed new high-resolution magnetic measurements of sedimentary cores from the east northern Pacific ODP Site 1021 and the East equatorial Pacific ODP Site 851.
Jean-Pierre Valet, Anojh Thevarasan, Franck Bassinot, Tatiana Savranskaia, Naoufel Haddam   +4 more
doaj   +1 more source

A new inclination-based method to evaluate the global geomagnetic configuration and axial dipole moment

Earth and Planetary Physics, 2022
The strength and configuration of the geomagnetic field control the average shape of the magnetosphere. The pure dipole assumption and the virtual dipole moment (VDM), determined by individual records, have been widely adopted to evaluate the strength of
KaiHua Xu, Fei He, Yong Wei, Ross N. Mitchell, Si Chen, YuQi Wang, ZhaoJin Rong   +6 more
doaj   +1 more source

The Cretaceous Normal Superchron: A Mini-Review of Its Discovery, Short Reversal Events, Paleointensity, Paleosecular Variations, Paleoenvironment, Volcanism, and Mechanism

Frontiers in Earth Science, 2022
The Cretaceous Normal Superchron (CNS) was first defined in the 1960s to explain the Cretaceous Quiet Zone in marine magnetic anomaly profiles, which includes no or fewer geomagnetic reversals.
Yutaka Yoshimura
doaj   +1 more source

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
doaj   +1 more source

Fast Directional Changes during Geomagnetic Transitions: Global Reversals or Local Fluctuations?

Geosciences, 2021
Paleomagnetic investigations from sediments in Central and Southern Italy found directional changes of the order of 10∘ per year during the last geomagnetic field reversal (which took place about 780,000 years ago).
Stefano Maffei, Philip W. Livermore, Jon E. Mound, Sam Greenwood, Christopher J. Davies   +4 more
doaj   +1 more source

Insights into pre-reversal paleosecular variation from stochastic models

Frontiers in Earth Science, 2015
To provide insights on the paleosecular variation of the geomagnetic field and the mechanism of reversals, long time series of the dipolar magnetic moment are generated by two different stochastic models, known as the domino model and the inhomogeneous ...
Klaudio ePeqini, Bejo eDuka, Angelo eDe Santis   +2 more
doaj   +1 more source

Predictability of Magnetic Field Reversals

Mathematics
Geomagnetic field measurements indicate that at present we may be on the brink of the Earth’s magnetic field reversal, potentially resulting in all the accompanying negative consequences for the mankind.
Daniil Tolmachev, Roman Chertovskih, Simon Ranjith Jeyabalan, Vladislav Zheligovsky   +3 more
doaj   +1 more source

Evidence for Missing Geomagnetic Reversals From Geomagnetic Reversal Frequency Model Using Adaptive Kernel Density Estimation

Geophysical Research Letters
The existence of missing geomagnetic reversals has been proposed, with potential for new magnetostratigraphic age controls. We estimate geomagnetic reversal frequency from 0 to 155 Ma using adaptive‐bandwidth kernel density estimation (AKDE) to evaluate ...
Yutaka Yoshimura, Masakazu Fujii, Hideitsu Hino, Shotaro Akaho, Satoshi Kuriki, Osamu Ishizuka, Toshitsugu Yamazaki, Hyeon‐Seon Ahn, Tesfaye Kidane, Yuhji Yamamoto, Yo‐ichiro Otofuji   +10 more
doaj   +1 more source

Cretaceous–Palaeogene Plate Boundary Evolution at the Pacific Margins of Zealandia and West Antarctica

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.
Improved satellite‐derived gravity data support updated interpretations and models of ancient plate boundaries and plate motions affecting Zealandia and West Antarctica. The models combine to confidently resolve hundreds of kilometres of Late Cretaceous–Eocene motion between the Pacific and Lord Howe plates, confirming that plate circuit constructions ...
Graeme Eagles
wiley   +1 more source

Bats respond to very weak magnetic fields. [PDF]

PLoS ONE, 2015
How animals, including mammals, can respond to and utilize the direction and intensity of the Earth's magnetic field for orientation and navigation is contentious.
Lan-Xiang Tian, Yong-Xin Pan, Walter Metzner, Jin-Shuo Zhang, Bing-Fang Zhang   +4 more
doaj   +1 more source