Results 31 to 40 of about 737 (157)
Jerk and Hyperjerk in a Rotating Frame of Reference [PDF]
, 2015 Jerk is the derivative of acceleration with respect to time and then it is the third order derivative of the position vector. Hyperjerks are the n-th order derivatives with n>3.
Sparavigna, Amelia Carolina
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Contributions to Geophysics and Geodesy, 2018 We report phenomenological inevitable correlation between the Sun’s magnetic field oscillation through the Earth and the Jupiter, with sinusoidal geomagnetic jerks observed at the Earth, additionally aligned with the gravity and length of day sinusoidal ...
Mohsen LUTEPHY
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Semi‐decadal and decadal signals in atmospheric excitation of length‐of‐day
Earth and Space Science, 2020 At timescales shorter than about 2~yr, non‐tidal length‐of‐day (LOD) variations are mainly excited by angular momentum exchanges between the atmospheric, oceanic and continental hydrological fluid envelopes and the underlying solid Earth.
Nan Yu. +4 more
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A global analysis of the 1991 geomagnetic jerk [PDF]
Geophysical Journal International, 2000 Summary A recent examination of the geomagnetic annual mean values for the European magnetic observatories has shown the existence of a sudden change in the secular acceleration in about 1991 (Cafarella & Meloni 1995; Macmillan 1996). Using first differences of the Y (east geomagnetic field component) mean values from 74 observatories, the worldwide
Paola De Michelis +2 more
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Rescue, integration, and analytical application of historical data from eight pioneering geomagnetic observatories in China [PDF]
Earth System Science DataDecades 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 +12 more
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Stochastic modelling of regional archaeomagnetic series [PDF]
, 2014 SUMMARY We report a new method to infer continuous time series of the declination, inclination and intensity of the magnetic field from archeomagnetic data.
Bouligand, C. +3 more
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Strong earthquakes and geomagnetic jerks: a cause-effect relationship?
Annals of Geophysics, 1995 Secular variation of the geomagnetic field observed at the Earth's surface has been found to undergo impulsive accelerations Gerks) lasting less than a few years. In this paper the relations between jerks and the occurrence of strong earthquakes (Ms ?
L. Alfonsi, F. Florindo
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Evidence for geomagnetic jerks in comprehensive models [PDF]
Earth, Planets and Space, 2005 Abstract The rate of secular variation occasionally undergoes a sudden, sharp change, called a geomagnetic jerk. Such jerks have been detected in geomagnetic time series, centered—over the last four decades—around 1971, 1980, 1991, and 1999; others have been inferred from historical records. The geomagnetic jerks represent a reorganization of
Chambodut, A., Mandea, M.
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Earth, Planets and Space, 2022 A regional harmonic spline geomagnetic main field model, Southern Africa Core Field Model (SACFM-3), is derived from Swarm satellite and ground-based data for the southern African region, in the eastern part of the South Atlantic Anomaly (SAA) where the ...
Emmanuel Nahayo, Monika Korte
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Assessing the importance and expression of the 6-year geomagnetic oscillation [PDF]
, 2012 The first time derivative of residual length-of-day observations is known to contain a distinctive 6 year periodic oscillation. Here we theorize that through the flow accelerations at the top of the core the same periodicity should arise in the ...
Abarca del Rio +37 more
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