Results 41 to 50 of about 735 (194)
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract In paleomagnetism, bulk measurements of entire samples have traditionally been used to characterize remanent magnetization. While effective, this approach provides only a general directional estimate and cannot resolve spatial variability or magnetization at the grain scale.
Gelson F. Souza‐Junior +5 more
wiley +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract Paleomagnetic and rock magnetic analyses were conducted on sediment cores from the northeastern Greenland Shelf and Young Sound along the western edge of Fram Strait. The paleomagnetic signal in all three sediment cores is characterized by a strong and stable single component magnetization carried by low coercivity ferrimagnetic single domain ...
Juliette Girard +7 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, 2013 We obtain new 40Ar/39Ar ages for three lavas that record part of the Matuyama‐Brunhes geomagnetic field reversal process on Guadeloupe. These lavas record a reversed‐transitional‐reversed magnetostratigraphy and yield a weighted mean isochron age of 785 ...
M. C. Brown +3 more
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Responses of the African and American Equatorial Ionization Anomaly (EIA) to 2014 Arctic SSW Events
Space Weather, 2021 Aside from the influence of forcing from above on the ionosphere during space weather, forcing from below also have significant influence on the ionosphere.
O. R. Idolor, A. O. Akala, O. S. Bolaji
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract We demonstrate the presence of the oldest identifiable marine magnetic anomalies in the Phoenix lineations of the western Pacific based on careful assessment of new data. Recently acquired sea surface magnetic anomalies and multichannel seismic profiles confirm magnetic signals recorded within the Middle‐Jurassic to Early Cretaceous basement ...
Masako Tominaga +4 more
wiley +1 more source
Geomagnetic Field, Polarity Reversals [PDF]
, 2012 Bernard Brunhes (1906) was the first to measure magnetization directions in rocks that were approximately antiparallel to the present Earth’s field. Brunhes (1906) recorded magnetizations in baked sedimentary rocks that were aligned with reverse magnetization directions in overlying Miocene lavas from central France (Puy de Dome). In so doing, Brunhes (
openaire +4 more sources
Predictability of Magnetic Field Reversals
MathematicsGeomagnetic 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 +3 more
doaj +1 more source
Impact of Solar Irradiance on Storm‐Time Thermospheric Mass Density Response
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract As a key parameter in the externally forced ionosphere–thermosphere (IT) system, mass density response to storms is affected by the prevailing solar irradiance. To better understand this relationship, we examine mass density responses to the same storm but with different background solar irradiance levels.
Simin Zhang +5 more
wiley +1 more source
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 ...
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Evolution of Open Magnetic Flux During Substorms: The Effects of Dipole Tilt Angle
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract There is a long‐standing debate on the causes of the semiannual variation of geomagnetic activity. One of the prevailing hypotheses is that the Earth's dipole tilt angle Ψ ${\Psi }$ modulates the dayside reconnection rate, causing the so‐called equinoctial effect. Here we perform the first large‐scale statistical study to test this hypothesis.
A. Nair +3 more
wiley +1 more source