On Short-Period Dynamics in the Earth’s Core According to Ground-Based Observations of Geomagnetic Jerks

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Abstract

The use of a special technique for processing variations of the geomagnetic field at several mid-latitude observatories allowed us to identify a series of jerks over a 17-year period, from 2004 to 2020. To interpret the experimental results showing that jerks follow with a quasi period of 3‒4 years, a probable mechanism of the occurrence of rapid changes in the geomagnetic field caused by unstable processes in the Earth’s core is proposed.

About the authors

S. A. Riabova

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences; Sadovsky Institute of Geosphere Dynamics, Russian Academy of Sciences

Author for correspondence.
Email: riabovasa@mail.ru
123242 Russia, Moscow,; 119334 Russia, Moscow

S. L. Shalimov

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences

Email: riabovasa@mail.ru
123242 Russia, Moscow,

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