Results 11 to 20 of about 329,822 (248)

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement

open access: yesGeophysical 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

MECHANISM OF GEOMAGNETIC JERKS [PDF]

open access: yesVestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2017
Mechanism of geomagnetic jerks evident from the model of the hot Earth magnetic field is discussed here. Similar in their principle, reversals, excursions and jerks result from auto adjusting of temperature of the phase change (PC) “evaporation ...
V.V. Kuznetsov
doaj   +1 more source

“Tiny Wiggles” in the Late Miocene Red Clay Deposits in the North‐East of the Tibetan Plateau

open access: yesGeophysical Research Letters, 2021
Small amplitude or short period geomagnetic anomalies known as “tiny wiggles” (TWs) are often hard to identify because of magnetic signal smoothing in the marine record of geomagnetic reversals.
Rui Zhang   +11 more
doaj   +1 more source

Reversals in the large-scale αΩ-dynamo with memory [PDF]

open access: yesNonlinear Processes in Geophysics, 2015
Inversion of the magnetic field in a model of large-scale αΩ-dynamo with α-effect with stochastic memory is under investigation. The model allows us to reproduce the main features of the geomagnetic field reversals.
L. K. Feschenko, G. M. Vodinchar
doaj   +1 more source

REVERSALS IN THE 6-CELLS CONVECTION DRIVEN [PDF]

open access: yesVestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2015
We describe the large-scale model geodynamo, which based on indirect data of inhomogeneities in the density of the Earth’s core. Convection structure is associated with spherical harmonic Y24 , which defines the basic poloidal component of velocity ...
G.M. Vodinchar, L.K. Feshenko
doaj   +1 more source

GEOMAGNETIC EXCURSION RECORD PRESERVED IN THE SPELEOTHEM FROM WESTERN CAUCASUS: FIRST DATA

open access: yesГеодинамика и тектонофизика, 2022
The study of the geomagnetic field evolution on minor timescales, in particular of such significant events as geomagnetic reversals and excursions, has acquired particular relevance nowadays due to the increased attention of mankind to the environment ...
D. A. Gavriushkin   +3 more
doaj   +1 more source

Effects of the Laschamps Excursion on Geomagnetic Cutoff Rigidities

open access: yesGeochemistry, Geophysics, Geosystems, 2022
Today's geomagnetic field can prevent energetic particles, including solar energetic particles and galactic cosmic rays, from directly hitting the Earth's atmosphere.
Jiawei Gao   +4 more
doaj   +1 more source

Some new approaches to the study of the Earth's magnetic field reversals

open access: yesAnnals of Geophysics, 2003
Paleomagnetic studies clearly show that the polarity of the magnetic fi eld has been subject to reversals. It is generally assumed that polarity intervals are exponentially distributed.
G. Consolini, P. De Michelis
doaj   +1 more source

Palaeomagnetism of the Vendian traps of Volyn, southwestern margin of the East European Platform, P. 2: magnetostratigraphy

open access: yesГеофизический журнал, 2023
We present new results of palaeomagnetic studies of the Vendian (Ediacaran) rocks of the Volyn Basalt Province revealed by six boreholes on the NW Ukraine.
V.G. Bakhmutov   +3 more
doaj   +1 more source

A coupled core-mantle evolution: review and future prospects

open access: yesProgress in Earth and Planetary Science, 2020
In this review, I provide the current status and future prospects for the coupled core-mantle evolution and specifically summarize the constraints arising from geomagnetism and paleomagnetism on the long-term secular variations of the geomagnetic field ...
Takashi Nakagawa
doaj   +1 more source

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