Results 11 to 20 of about 130 (107)

Could the Mw = 9.3 Sumatra earthquake trigger a geomagnetic jerk? [PDF]

Eos, 2005
The magnetic field observed at the Earth's surface is not a stationary feature. It is characterized by time variations ranging from milliseconds (micropulsations) to millions of years (the time interval between field reversals). Time variations with periods of a year or longer are related to Earth's outer core sources, whereas for shorter timescales an
Fabio Florindo
exaly   +4 more sources

A taxonomy of simulated geomagnetic jerks [PDF]

Geophysical Journal International, 2022
Geomagnetic jerks - abrupt changes in the acceleration of Earth’s magnetic field that punctuate geomagnetic records - have been richly documented over the past decades by taking advantage of the complementary strengths of ground observatory and satellite measurements. It has recently been proposed that these events originate from the interplay and time
Aubert, Julien, Livermore, Philip, Finlay, Christopher, Fournier, Alexandre, Gillet, Nicolas   +4 more
openaire   +6 more sources

Signs of a new geomagnetic jerk between 2019 and 2020 from Swarm and observatory data

Earth, Planets and Space, 2021
Highlights Observatory and Swarm data reveal a new geomagnetic jerk around 2019–2020. A very recent geomagnetic field model indicates the global character of the new jerk. A new pulse at the CMB around mid-2018 seems to be the starting point of this jerk.
F. Javier Pavón-Carrasco, Santiago Marsal, Saioa A. Campuzano, J. Miquel Torta   +3 more
doaj   +1 more source

South Atlantic Anomaly Areal Extent as a Possible Indicator of Geomagnetic Jerks in the Satellite Era

Frontiers in Earth Science, 2021
Geomagnetic jerks are sudden changes in the geomagnetic field secular variation related to changes in outer core flow patterns. Finding geophysical phenomena related to geomagnetic jerks provides a vital contribution to better understand the geomagnetic ...
S. A. Campuzano, F. J. Pavón-Carrasco, A. De Santis, A. De Santis, A. González-López, A. González-López, E. Qamili   +6 more
doaj   +1 more source

On the characteristics of successive geomagnetic jerks [PDF]

Earth, Planets and Space, 2014
Spherical harmonic models of the 1969, 1979 and 1992 geomagnetic jerks are computed using data from about 160 worldwide geomagnetic observatories. The dominance of the internal origin part with respect to the external one confirms again the internal origin of these events. A change of sign is observed between two successive jerks (1969–1979, 1979–1992).
Le Huy, Minh, Alexandrescu, Mioara, Hulot, Gauthier, Le Mouël, Jean-Louis   +3 more
openaire   +2 more sources

IRREGULARITIES IN THE DISPLACEMENT OF THE EARTH’S GEOGRAPHIC POLE AND JERKS IN THE GEOMAGNETIC FIELD

Геодинамика и тектонофизика, 2023
There are presented the results of analysis of some irregularities in the series of displacement coordinates on the Earth’s surface for the geographic North Pole in order to relate them temporally to some global jerks in the geomagnetic field.
G. S. Kurbasova, A. E. Volvach
doaj   +1 more source

On the radiation belt location during the 23rd and 24th solar cycles [PDF]

Annales Geophysicae, 2019
Within the last two solar cycles (from 2001 to 2018), the location of the outer radiation belt (ORB) was determined using NOAA/Polar-orbiting Operational Environmental Satellite (POES) observations of energetic electrons with energies above 30 keV.
A. V. Dmitriev, A. V. Dmitriev
doaj   +1 more source

Secular variations on the North American tectonic plate

Геофизический журнал, 2022
Based on the results of geomagnetic observatories located near the North magnetic pole and in the middle latitudes of the North American tectonic plate, the secular variations (SV) of the Earth’s geomagnetic field have been studied.
T.P. Sumaruk, P.V. Sumaruk
doaj   +1 more source

Rescue, integration, and analytical application of historical data from eight pioneering geomagnetic observatories in China [PDF]

Earth System Science Data
Decades to centuries of continuous geomagnetic observation data have extensive scientific research and practical application value, especially in revealing the long-term variation of the geomagnetic field, which is irreplaceable. During the International
S. Zhang, C. Fu, J. Wang, C. Chen, G. Zhu, Q. Zhao, J. Chen, S. He, B. Wang, P. Guo, N. Deng, J. Lu, H. Yu   +12 more
doaj   +1 more source

Clockwise and counter clockwise 6 & 9 year geostrophic MC (& Rossby) waves in centre of the mechanism of geomagnetic jerks and relevant LODs

Contributions to Geophysics and Geodesy, 2022
Versus the theory of fully stochastically mechanism of geomagnetic jerks based on the buoyant force driven Quasi-Geostrophic (QG) dynamo, the torsional waves in realistic condition of the Earth's core evolve in the intradecadal time scales.
Mohsen LUTEPHY, Botir Berdiyorovich ISMAILOV, Adnan Hashim ABDULKADHIM   +2 more
doaj   +1 more source