| Full text | |
| Author(s): |
Carmo, C. S.
;
Denardini, C. M.
;
Figueiredo, C. A. O. B.
;
Resende, L. C. A.
;
Moro, J.
;
Silva, R. P.
;
Nogueira, P. A. B.
;
Chen, S. S.
;
Picanco, G. A. S.
;
Neto, P. F. Barbosa
Total Authors: 10
|
| Document type: | Journal article |
| Source: | JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS; v. 235, p. 9-pg., 2022-09-01. |
| Abstract | |
In this work, we observe for the first time the unusual pre-sunrise Equatorial Plasma Bubbles (EPBs) during a moderate geomagnetic storm recovery phase caused by the High-Speed Solar Wind Stream (HSS) on February 17, 2015, over the Brazilian sector. Therefore, this study aims to explain the generation mechanism of this uncommon event, which started at 08:00 UT on February 18, 2015. We used Multiple Global Navigation Satellite Systems (Multi-GNSS, GPS, and GLONASS) data to produce two-dimensional maps of the Rate Of TEC index (ROTI) that show EPB features elongated in magnetic meridians. Also, Digisonde data from Sa similar to o Luis (2.53 degrees S, 44.30 degrees W, dip angle: 8.57 degrees), Boa Vista (12.81 degrees N, 60.67 degrees W, dip angle: 33.71 degrees), and Campo Grande (20.44 degrees S, 54.64 degrees W, dip angle: 25.98 degrees), and magnetometer data at Sa similar to o Luis and Euse ' bio (3.89 degrees S, 38.45 degrees W, dip angle: 17.96 degrees). Our analysis shows that the unusual pre-sunrise plasma bubbles lasted longer after sunrise, around 1 h. Finally, we showed that these EPBs are likely driven by a disturbance wind dynamo effect, which helps to understand the role of the external factors in EPBs development. (AU) | |
| FAPESP's process: | 18/09066-8 - TRAVELLING IONOSPHERIC DISTURBANCES OBSERVED BY DETRENDED TOTAL ELECTRON CONTENT MAPS/KEOGRAM OVER ANDES MOUNTAINS |
| Grantee: | Cosme Alexandre Oliveira Barros Figueiredo |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |