Results 71 to 80 of about 471 (192)

What causes geomagnetic reversals? [PDF]

Chinese Science Bulletin, 2016
Geomagnetic reversal is known as one of the most dramatic changes on Earth in that the north and south poles of the geomagnetic field switch their positions every 0.1–1 million years. Since Bernard Brunhes and Motonori Matuyama identified the geomagnetic reversal in the early 20th century, remarkable progress has been made on understanding the causes ...
openaire   +1 more source

Cambrian Stage 3 Paleomagnetism of the South China Block: Implications for Early Paleozoic Gondwana Reconstructions

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract The paleogeographic position of the South China Block (SCB) during the early Paleozoic and its affiliation with Gondwana remain debated. We report new high‐quality paleomagnetic data from sandstone‐dominated Cambrian Stage 3 strata correlated with the Yu'anshan–Hongjingshao succession collected along the southwestern margin of the SCB ...
Dongmeng Zhang, Xin Cheng, Vadim A. Kravchinsky, Mengting Zhong, Bitian Wei, Nan Jiang, Longyun Xing, Shuqi Lan, Weijie Zhang, Jiahui Zhang, Chao Chang, Wei Liu, Yanan Zhou, Xingliang Zhang, Hanning Wu   +14 more
wiley   +1 more source

Transition of Glacial Regimes Recorded at IODP Site U1524 in the Ross Sea, Antarctica, Over the Last 800 Thousand Years

Paleoceanography and Paleoclimatology, Volume 41, Issue 10, October 2026.
Abstract Reconstructing past interactions between the West Antarctic Ice Sheet (WAIS) and changing environmental conditions in the Ross Sea region can help determine long‐term WAIS stability. Existing sedimentary records reveal changes to oceanography, sea ice and ice sheet extent over the glacial‐interglacial cycles of the last ∼800 kyr.
J. W. Marschalek, T. van de Flierdt, M. O. Patterson, G. Grant, S. Kim, W. Xiao, Q. Li, G. Cortese, S. Bombard, R. M. Leckie, H. Ishii, T. van Peer, C. Xuan, S. Sugisaki, J. Müller, D. Kaufman, D. K. Kulhanek, K. J. Licht, S. R. Hemming, O. Seki, E. Colizza, F. Torricella, J. Gales, B. W. Romans, N. Varela, L. De Santis, R. M. McKay   +26 more
wiley   +1 more source

How to control a temporary DIDD based observatory in the field?

Annals of Geophysics, 2013
One of the main challenges on the course of the repeat station surveys is to determine the spatial differences of the geomagnetic elements between the repeat stations and the reference observatory.
András Csontos, Danijel Šugar, Mario Brkić, Péter Kovács, László Hegymegi   +4 more
doaj   +1 more source

Modelling fast geomagnetic reversals

, 2020
<div> <p>Field reversals are some of the most prominent and commonly known temporal variations of the geomagnetic field. Polarity changes have been observed in seafloor magnetisation patterns, volcanic records, sediment sequences, speleothem records, and have been reported in geodynamo simulations.
Stefano Maffei, Philip Livermore, Sam Greenwood, Jonathan Mound   +3 more
openaire   +1 more source

Ionospheric Mechanisms Leading to Plasma‐Bubble Zonal Drift Reversal and Deformation During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 10, October 2026.
Abstract We present a multi‐instrument analysis of the ionospheric response to the intense geomagnetic storm of 12 November 2025 over the American sector, with emphasis on the longitudinally asymmetric deformation, latitudinal expansion, and zonal drift reversal of equatorial plasma bubbles (EPBs).
G. A. S. Picanço, I. Galkin, P. Song, E. Astafyeva, L. C. A. Resende, J. P. Marchezi, L. A. da Silva, P. R. Fagundes, C. M. Denardini, C. Martinis, A. M. Santos, V. G. Pillat, A. J. Coster, A. L. Christovam, S. R. Laranja, M. A. M. Lopes   +15 more
wiley   +1 more source

Geomagnetism, volcanoes, global climate change, and predictability. A progress report

Annals of Geophysics, 1994
A model is investigated, by which the encounters of the solar system with dense interstellar clouds ought to trigger either geomagnetic field reversals or excursions, that produce extra electric currents within the Earth dynamo, that cause extra Joule's ...
G. P. Gregori
doaj   +1 more source

ScintPi 4.0: A New GNSS‐Based Low‐Cost, Multi‐Constellation, Multi‐Frequency Ionospheric Scintillation and TEC Monitor for Education, Citizen Science, and Research Initiatives

Space Weather, Volume 24, Issue 10, October 2026.
Abstract ScintPi is a series of alternative ionospheric scintillation and total electron content (TEC) monitors. ScintPi monitors have been built by combining single‐board computers (Raspberry Pi) and commercial off‐the‐shelf (COTS) Global Navigation Satellite System (GNSS) receivers.
Isaac G. Wright, Josemaria Gomez Socola, Fabiano S. Rodrigues, Mário A. N. Azevedo Filho   +3 more
wiley   +1 more source

Robustness of characteristics of the Matuyama-Brunhes geomagnetic field reversal found in global models

Frontiers in Earth Science
Paleomagnetic data enables the global reconstruction of the geomagnetic field, allowing the investigation of significant events like polarity reversals and excursions.
Ahmed Nasser Mahgoub, Ahmed Nasser Mahgoub, Monika Korte, Sanja Panovska, Maximilian Schanner   +4 more
doaj   +1 more source

Finding Novel Precursors for Solar Wind Stream Interaction Regions With Interpretable Deep Learning

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Solar wind stream interaction regions (SIRs) drive recurrent geomagnetic storms, yet most existing catalogs rely on expert inspection and simple thresholds that are subjective and can miss events with complex morphologies. We present SIREN (SIR Encoder Network), a lightweight Transformer‐based model for per‐timestep SIR detection from in situ ...
Prateek Mayank, Yogesh, Enrico Camporeale, D. Chakrabarty, Lan K. Jian, Gregory G. Howes, Thomas E. Berger   +6 more
wiley   +1 more source