Spectral analysis of the multiple-altitude anomalous geomagnetic field

Tsvetkov, Yu. P.; Ivanov, V. V.; Петров, В. Г.; Филиппов, С. В.; Brekhov, Oleg

doi:10.1134/s0016793216060153

Cited by 1 publication

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2. The experiment is described in detail in the author's publications (Tsvetkov et al 2015(Tsvetkov et al , 2016.…”

Section: Methodsmentioning

confidence: 99%

“…Spectra of the ground-based (VSEGEI 2004) and balloon magnetic profiles along the route of balloon surveys of 2013 are analysed in Tsvetkov et al (2016) by the methods of wavelet analysis and Fourier discrete transform. Components with wavelengths of 300-550 km can be seen in the long-wavelength parts of the spectra for both of the profiles.…”

Section: Spectral Analysismentioning

confidence: 99%

“…Taking into account the fact that the active profile length (~ 700 km) insignificantly exceeds the periods of harmonics identified in the long-wavelength parts of the spectra, as well as the fact that the ground-based profile does not represent in full measure the fields of deep sources (see above), this method of spectral analysis of the groundbased magnetic profile makes it impossible to state with certainty that such harmonics are contained in the data under investigation. The patterns of inhomogeneities in the anomalous magnetic fields are obtained by the method of wavelet analysis of the balloon and ground-based magnetic profiles (Tsvetkov et al 2016). Data of the balloon magnetic profile along the route are shown to contain inhomogeneities from 60 to 450 km in size, whereas the pattern of wavelet analysis based on the balloon magnetic data along the balloon flight route reveals a large inhomogeneity 450 km in size, which exactly coincides with the position of the maximum of the satellite KEMA cross section (52°E) (Tsvetkov et al 2016).…”

Section: Spectral Analysismentioning

confidence: 99%

“…The patterns of inhomogeneities in the anomalous magnetic fields are obtained by the method of wavelet analysis of the balloon and ground-based magnetic profiles (Tsvetkov et al 2016). Data of the balloon magnetic profile along the route are shown to contain inhomogeneities from 60 to 450 km in size, whereas the pattern of wavelet analysis based on the balloon magnetic data along the balloon flight route reveals a large inhomogeneity 450 km in size, which exactly coincides with the position of the maximum of the satellite KEMA cross section (52°E) (Tsvetkov et al 2016). Such an approach with the use of an independent method demonstrates that the spectrum of data of the balloon profiles is saturated with low-frequency components, whereas such components are absent in aeromagnetic data, because the wavelet pattern constructed on the basis of aeromagnetic data is devoid of inhomogeneities, whose size exceeds 130 km (Tsvetkov et al 2016).…”

Section: Spectral Analysismentioning

confidence: 99%

See 3 more Smart Citations

Sources of the lithosphere magnetic field based on magnetic data obtained at different heights

Tsvetkov

Novikov²,

Ivanov

et al. 2018

Earth Planets Space

View full text Add to dashboard Cite

Our investigations are based on the property that the fields of sources, whose depths are numerically equal to survey heights, are most brightly presented in the data of magnetic survey. Therefore, the magnetic field created by the upper boundary of the magnetically active layer is well presented in the data of magnetic surveys (survey heights are up to the first kilometres), whereas the geomagnetic field of the centre mass is well presented in the data of gradient magnetic surveys at heights of 20-40 km. These data were used separately for the interpretation of the depths of the upper and lower boundaries of the lithospheric magnetically active layer by spectral methods. This fact is especially valuable for estimating the positions of deep sources. For the central part of the East European platform, we obtained by spectral methods, the following values: the depth of the upper boundary of the layer is 8.5 km and that of the lower boundary of the layer is 64.3 km. The discrete localisation of the source depths along the profile is performed by the methods of converting the initial information into transformed fields, continuation upward, and reduction to the pole with the determination of singular points. The Poisson integral, representing the solution of the outer Dirichlet problem for the plane, served as a theoretical base for such an interpretation. These approaches made it possible to determine more exactly the localisation of deep sources along the profile and showed that the published magnetic maps based on aeromagnetic data do not contain in full measure the fields of deep-seated magnetic sources.

show abstract

“…2. The experiment is described in detail in the author's publications (Tsvetkov et al 2015(Tsvetkov et al , 2016.…”

Section: Methodsmentioning

confidence: 99%

Section: Spectral Analysismentioning

confidence: 99%