Signature of geomagnetic superstorm in Earth's rotation speed

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A connection between solar activity and decadal Length of day variations is investigated. Statistical comparison of Length of day with various geomagnetic and Solar activity indices has been done for the last 140 years. A jump in Length of day (LOD) is found at the moment of the geomagnetic storm, the largest one for the last few decades, that happened in late October 2003, the so called Halloween storm. This change in rotational velocity of the Earth can not be explained by any known atmospheric or oceanic influences. Moreover, such jump in LOD is an unique one for the few recent years. It is supposed that this jump can be caused by transfer of angular momentum between Solar wind and the solid Earth. A possible mechanism of such a transfer is proposed.

Original languageEnglish
Article number012020
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - 17 Dec 2020
EventInternational Conference PhysicA.SPb 2020 - ФТИ им. А.Ф. Иоффе, Санкт-Петербург, Russian Federation
Duration: 19 Oct 202023 Oct 2020

Scopus subject areas

  • Physics and Astronomy(all)


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