Results 1 to 10 of about 130 (107)
Core Surface Flow Changes Associated With the 2017 Pacific Geomagnetic Jerk [PDF]
Geophysical Research Letters, 2022 A geomagnetic jerk was seen in Swarm satellite data in 2017 over the Pacific region. We invert time series of spatial gradient secular variation data between 2014 and 2020, reduced to a grid of points at satellite altitude, for spatially‐ and temporally ...
Christopher C Finlay +2 more
exaly +3 more sources
Intradecadal variations in length of day and their correspondence with geomagnetic jerks [PDF]
Nature Communications, 2020 Earth rotation variation reflects the physics, dynamics and the magnetic field changes of Earth’s interior. The authors find a significant ~8.6 year periodic increasing oscillation in length of day and its good link to geomagnetic jerks related to Earth ...
Pengshuo Duan, Chengli Huang
doaj +5 more sources
Towards Understanding the Interconnection between Celestial Pole Motion and Earth’s Magnetic Field Using Space Geodetic Techniques [PDF]
Sensors, 2021 The understanding of forced temporal variations in celestial pole motion (CPM) could bring us significantly closer to meeting the accuracy goals pursued by the Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG), i.e.
Sadegh Modiri +7 more
doaj +2 more sources
Detection of a New Large Free Core Nutation Phase Jump [PDF]
Sensors, 2022 We announce the detection of a new large jump in the phase of the free core nutation (FCN). This is only the second such large FCN phase jump in more than thirty years of FCN monitoring by means of a very long baseline interferometry (VLBI) technique ...
Zinovy Malkin +2 more
doaj +2 more sources
Earth and Planetary Physics, 2023 The secular variation in the global geomagnetic field was analyzed in terms of the annual differences in monthly means by using the hourly mean data from 18 foreign (outside China) observatories of the World Data Center (WDC) for Geomagnetism from ...
YiJun Li +5 more
exaly +3 more sources
Analysis of geomagnetic observatory data and detection of geomagnetic jerks with the MOSFiT software package [PDF]
Geoscientific Instrumentation, Methods and Data Systems, 2023 MOSFiT (Magnetic Observatories and Stations Filtering Tool) is a Python package to visualize and filter data from magnetic observatories and magnetometer stations.
M. V. da Silva +4 more
doaj +6 more sources
Geodesy and Geodynamics, 2022 The period and quality factor of the Chandler wobble (CW) are useful for constraining the Earth's internal structure properties, such as the mantle elasticity.
Hao Ding
exaly +3 more sources
Evidence for a new geomagnetic jerk in 2014
Geophysical Research Letters, 2015 AbstractThe production of quasi‐definitive data at Ebre observatory has enabled us to detect a new geomagnetic jerk in early 2014. This has been confirmed by analyzing data at several observatories in the European‐African and Western Pacific‐Australian sectors in the classical fashion of looking for the characteristic V shape of the geomagnetic secular
F Javier Pavón-Carrasco +2 more
exaly +2 more sources
Evidence for a geomagnetic jerk in 1990 across Europe
Annals of Geophysics, 1995 The analysis of geomagnetic data from magnetic observatories demonstrated the existence of very rapid changes, or jerks, in the secular variation, especially the occurrence of the well known geomagnetic jerks of 1969 and 1978.
A. Meloni, L. Cafarella
doaj +4 more sources
Worldwide character of the 1991 geomagnetic jerk [PDF]
Geophysical Research Letters, 1998 A recent examination of the geomagnetic element annual mean values for the European magnetic observatories, has shown the existence of a sudden change in the secular acceleration at about 1991. In this work the space time character of the 1991 impulse is investigated and its worldwide character is evidenced; an evaluation of the amplitude spatial ...
Paola De Michelis, Lili Cafarella
exaly +3 more sources