Work

Magnitude of the anomalous geomagnetic fields

Year: 2025

Type: article

Abstract: The normalized amplitudes of the anomalous geomagnetic field variations (presented by tipper C) with period T>200 s arising around electrical conductivity anomalies have been considered. C>1 means that the secondary (induced) field is greater than the primary (inducing) one. Worldwide, the mean observed tippers are C=0.3 for coastal observatories and C=0.15 for inland ones. The maximum tippers are 1.5 for coastal and C=1.6 for inland observatories. Modeling realistic anomalies with uniform conductivity yields C up to 2.5. The larger C can arise in a non-uniform conductor due to the superchanneling effect.

Source: Geofizicheskiy Zhurnal

DOI: 10.24028/gj.v47i2.322473

Authors: I.I. Rokityansky, A.V. Tereshyn

Institution: National Academy of Sciences of Ukraine

Language: English

Topic: Geophysical and Geoelectrical Methods

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: diamond

OpenAlex ID: W4409647107

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