DOAJ Open Access 2022

Detection of a New Large Free Core Nutation Phase Jump

Zinovy Malkin Santiago Belda Sadegh Modiri

Abstrak

We announce the detection of a new large jump in the phase of the free core nutation (FCN). This is only the second such large FCN phase jump in more than thirty years of FCN monitoring by means of a very long baseline interferometry (VLBI) technique. The new event was revealed and confirmed by analyzing two FCN models derived from a long-time series of VLBI observations. The jump started in 2021 and is expected to last until the late fall of 2022. The amplitude of the phase jump is expected to be approximately 3 rad, which is as much as 1.5 times larger than the first phase jump in 1999–2000. A connection of the new FCN phase jump with the recent geomagnetic jerk started in 2020 is suggested.

Topik & Kata Kunci

Chemical technology

Penulis (3)

Zinovy Malkin

Santiago Belda

Sadegh Modiri

Format Sitasi

APA MLA BibTeX

Malkin, Z., Belda, S., Modiri, S. (2022). Detection of a New Large Free Core Nutation Phase Jump. https://doi.org/10.3390/s22165960

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Informasi Jurnal

Tahun Terbit: 2022
Sumber Database: DOAJ
DOI: 10.3390/s22165960
Akses: Open Access ✓