Results 31 to 40 of about 323 (143)

Rescue and quality control of historical geomagnetic measurement at Sheshan observatory, China [PDF]

Earth System Science Data, 2022
The Sheshan Geomagnetic Observatory (International Association of Geomagnetism and Aeronomy (IAGA) code SSH), China was built in Xujiahui, Shanghai in 1874 and moved to Sheshan, Shanghai at the end of 1932.
S. Zhang, C. Fu, J. Wang, G. Zhu, C. Chen, S. He, P. Guo, G. Chang   +7 more
doaj   +1 more source

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

Geomagnetic field declination: from decadal to centennial scales [PDF]

Solid Earth, 2018
Declination annual mean time series longer than 1 century provided by 24 geomagnetic observatories worldwide, together with 5 Western European reconstructed declination series over the last 4 centuries, have been analyzed in terms of the frequency ...
V. Dobrica, C. Demetrescu, M. Mandea
doaj   +1 more source

Measuring chandler wobble amplitude variations using IERS EOP C04 data [PDF]

Serbian Astronomical Journal, 2023
We analyzed the Earth's long-term polar motion using the time series IERS EOP C04 (International Earth Rotation and Reference Systems Service - IERS; Earth Orientation Parameters - EOP; Combination of four (04) techniques - C04), from 1984 to ...
Damljanović G., Vasilić V.
doaj   +1 more source

Regional character of geomagnetic field directional circularity: Holocene Eastern North America

Frontiers in Earth Science, 2023
This study characterizes the paleomagnetic secular variation (PSV) in five Holocene records from Eastern North America. We have determined equi-spaced (100-year) declination and inclination time series for the five sites and compared their directional ...
Steven P. Lund
doaj   +1 more source

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

Interplanetary external driven quasidynamo as the origin of geomagnetic jerks correlated with length of day and gravity anomaly

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
doaj   +1 more source

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., Gang Chen, Jim Ray, Wei Chen, Nengfang Chao   +4 more
doaj   +1 more source

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, Lili Cafarella, Antonio Meloni   +2 more
openaire   +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