Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement
Geophysical Monograph Series, Page 27-82., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm +2 more
wiley +1 more source
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 +2 more
doaj +1 more source
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 +5 more
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An Impending geomagnetic transition? Hints from the past.
Frontiers in Earth Science, 2015 The rapid decrease of the geomagnetic field intensity in the last centuries has led to speculations that an attempt to a reversal or an excursion might be under way.
Carlo eLAJ, Catherine eKISSEL
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Geochemistry, Geophysics, Geosystems, 2021 Studying paleosecular variation (PSV) can provide unique insights into the average morphology of the geomagnetic field and the operation of the geodynamo.
B. T. Handford +3 more
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Mantle superplumes induce geomagnetic superchrons
Frontiers in Earth Science, 2015 We use polarity reversal systematics from numerical dynamos to quantify the hypothesis that the modulation of geomagnetic reversal frequency, including geomagnetic superchrons, results from changes in core heat flux related to growth and collapse of ...
Peter eOlson, Hagay eAmit
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Geomagnetic and ionospheric data analysis over Antarctica: a contribution to the long term trends investigation [PDF]
Annales Geophysicae, 2008 The analysis of the foF2 ionosonde data acquired at mid and high latitudes reveals a general decreasing of the F2 plasma frequency over more than two solar cycles, showing steeper trends over the high latitude stations and, in particular, over ...
L. Alfonsi +2 more
doaj +1 more source
Deciphering records of geomagnetic reversals [PDF]
Reviews of Geophysics, 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 of paleomagnetic reversal records have been acquired during the past 50 years in order to better ...
Valet, Jean-Pierre, Fournier, Alexandre
openaire +5 more sources
The South Atlantic Anomaly: the key for a possible geomagnetic reversal
Frontiers in Earth Science, 2016 The South Atlantic Anomaly is nowadays one of the most important features of the Earth’s magnetic field. Its extent area at the Earth’s surface is continuously growing since the intensity instrumental measurements are available covering part of the ...
F. Javier ePavón-Carrasco +3 more
doaj +1 more source
Volcanic Record of the Last Geomagnetic Reversal in a Lava Flow Sequence From the Azores
Frontiers in Earth Science, 2020 We present paleomagnetic and geochronological data of twenty-five stacked lava flows from São Miguel Island (Azores) that were emplaced during the last geomagnetic reversal (Matuyama-Brunhes, M-B).
Julia Ricci +5 more
doaj +1 more source