IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Print this page

Evolution of the virtual dipole moment in Earth's geological history
Schreider, A.A.; Sazhneva, A.E.; Varga, P.; Denis, C. (2019). Evolution of the virtual dipole moment in Earth's geological history. Oceanology 59(5): 771-776. https://dx.doi.org/10.1134/S0001437019050187
In: Oceanology. Maik Nauka/Springer: Moscow. ISSN 0001-4370; e-ISSN 1531-8508, more
Peer reviewed article  

Available in  Authors 

Author keywords
    virtual dipole moment; Earth's history

Authors  Top 
  • Schreider, A.A.
  • Sazhneva, A.E.
  • Varga, P.
  • Denis, C.

Abstract
    Data of the International Bank of Digital Information on the time distribution of the virtual dipole moment (VDM), supplemented by data of more recent studies (a total of 5645 values), were used as the basis for analyzing the distribution of VDM values for Earth’s history using the concept of the Earth’s magnetic dipole field. The VDM behavior is characterized by a positive linear trend from 4.2 × 10 22 Am2 (4.2 GA ago) to 5.15 × 1022 Am2 today. Against a linear increase in the field, VDM undulations nonuniformly distributed over time have been recorded, varying in magnitude from 1.7 to 3.7 × 1022 Am2 wavelength from 220 to 920 Ma. The average wavelength of such undulations is estimated at 570 Ma, which in order of magnitude approaches the period of the Wilson cycle. It has been revealed for the first time that the magnitudes of magnetic field undulations over time are oscillatory in nature and increase toward present day.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors