Articles | Volume 38, issue 2
Ann. Geophys., 38, 437–443, 2020
https://doi.org/10.5194/angeo-38-437-2020

Special issue: 7th Brazilian meeting on space geophysics and aeronomy

Ann. Geophys., 38, 437–443, 2020
https://doi.org/10.5194/angeo-38-437-2020

Regular paper 31 Mar 2020

Regular paper | 31 Mar 2020

Semimonthly oscillation observed in the start times of equatorial plasma bubbles

Igo Paulino et al.

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Latest update: 22 Oct 2021
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Short summary
In this paper, an extensive study has been done in order to investigate periodic oscillations in the start times of equatorial plasma bubbles observed over Brazil. Using OI6300 airglow images and ionograms, it was possible to detect semimonthly oscillations in the start times of equatorial plasma bubbles (EPBs) and equatorial Spread-F. This semimonthly oscillation is likely related to the lunar tide, which represents an important mechanism acting in the day-to-day variability of EPBs.