When did people begin to do research regarding geomagnetic field changing? Any references?

03 December 2014 1 8K Report

I need some information about the research history in relation to geomagnetic field changing, some articles might be better. Thanks very much.

Hrvoje Tkalčić

As a start, I would look in an old paper in Philosophical Transactions by Halley (1686). According to his model, the inner core of the Earth was described as a solid sphere with two moveable magnetic poles in the Earth's centre, rotating differentially with respect to the rest of the planet. Its existence was invoked to explain observations of apparent four magnetic poles, which were later understood as the spatial variation of a magnetic field containing a superposition of dipole and non-dipole components.

Halley, E. (1686), An account of the cause of the change of the variation of the magnetical 1625 needle; with an hypothesis of the structure of the internal parts of the Earth: As it was 1626 proposed to the Royal Society in one of their late meetings, Philosophical Transactions, 1627 16 (179-191), 563{578, doi:10.1098/rstl.1686.0107.

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Leonardo Sagnotti

National Institute of Geophysics and Volcanology

I would recommend to have a look to the comprehensive review published by Stern (Stern, D. P. (2002). A millennium of geomagnetism. Reviews of geophysics, 40(3), 1-1).

It was probably Henry Gellibrand (1597–1636) the first scientist to report that the magnetic declination observed near London had undergone a systematic shift.

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P. Bobik

Slovak Academy of Sciences

Record of geomagnetic field changing measurements has earlier history in China. Around 720 astronomer Yi-Xing measured magnetic declination, then Shen Kuo in the 11. century first described magnetic declination. References can be found in Joseph Needham, Science and Civilization in China books.

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Guijun Wan

Nanjing Agricultural University

Thanks you all so much. That have helped me a lot and so sorry for the late responds, since I am busy at my PhD graduation at the same time. Happy new year!

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Dimitris Poulos

Independent Researcher

I have writen and documented and discovered that earth geomagnetic field is force oscillating by solar wind oscillations derived from earth-venus resonance

https://www.researchgate.net/profile/Dimis_Poulos

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