Results 1 to 10 of about 15,450 (291)
Geomagnetic core field models and secular variation forecasts for the 13th International Geomagnetic Reference Field (IGRF-13) [PDF]
Earth, Planets and Space, 2020 Observations of the geomagnetic field taken at Earth’s surface and at satellite altitude are combined to construct continuous models of the geomagnetic field and its secular variation from 1957 to 2020.
I. Wardinski +6 more
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Community participation in secular and religious contexts across sociodemographic groups in 22 countries [PDF]
Scientific ReportsIn an increasingly fragmented and isolated world, community participation remains an essential source of social connection. However, how community participation varies across countries and sociodemographic groups remains unclear.
Ying Chen +7 more
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A homogeneous aa index: 1. Secular variation [PDF]
Journal of Space Weather and Space Climate, 2018 Originally complied for 1868–1967 and subsequently continued so that it now covers 150 years, the aa index has become a vital resource for studying space climate change.
Lockwood Mike +5 more
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Geomagnetic Secular Variation [PDF]
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 2012 We analyse over 175000 magnetic observations from an interval spanning 1695-1980 to produce a sequence of maps of the magnetic field at the core-mantle boundary; we find that even the earlier data enable us to determine reliable maps. We produce these maps at approximately 60-year intervals through the eighteenth and nineteenth centuries, and at 10 ...
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Dependence of the velocity changes of secular variations on the position of observatory and time
Геофизический журнал, 2021 According to the data of world observatories net secular variations of geomagnetic fields from internal and outer sources have been studied. Averaged 3-year data have been used for this purpose.
T. P. Sumaruk, P. V. Sumaruk
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The Meaning of ‘Secular’ as a Scientific Concept
Secularism and Nonreligion, 2020 The meaning of ‘secular’ in the scientific use of ‘secular trend’, ‘secular variation’, and similar terms is a topic that merits historical investigation.
John Shook
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Earth and Space Science, 2021 This paper develops a composite absolute paleointensity record for Holocene paleomagnetic secular variation (PSV) from central North America. Twelve full‐vector (inclination, declination, paleointensity) PSV records were assessed in order to build the ...
Steve P. Lund +5 more
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Geochemistry, Geophysics, Geosystems, 2021 The state of the geomagnetic field throughout the Precambrian era is largely unknown. Approximately 8% of global paleointensity records account for ∼4 billion years of Earth history.
Simon J. Lloyd +2 more
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Jovimagnetic secular variation [PDF]
Nature, 1982 Long term variations of a planetary magnetic field are one of the few observables available in the study of planetary interiors and dynamo theory. While variations of the geomagnetic field were accessible to direct measurement for centuries, knowledge of the secular variations of other planetary dynamos is limited.
J. E. P. Connerney, M. H. Acuña
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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
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