Influence of Solar Wind High-Speed Streams on the Brazilian Low-Latitude Ionosphere During the Descending Phase of Solar Cycle 24.

ABSTRACT: This study investigates the Brazilian low-latitude ionospheric response to CIR/HSS-driven geomagnetic storms during the declining phase of solar cycle 24, from 2016 to 2017. In this period the geomagnetic storms were mostly moderate, SymH_min ≈ -72 nT, AE_max ≈ 1580 nT, Vsw_max ≈ 690 km/s and lasted, on average, for 6 days. We analyze the variations in Vertical Total Electron Content (VTEC) at three representative regions: bele, over the equatorial region; boav and cuib, at the northern and southern crests of the Equatorial Ionization Anomaly. Our findings reveal the role of High-Speed Solar Wind Streams and Corotating Interaction Region-driven geomagnetic storms. The VTEC intensifications were up to 30 TECu, during the daytime and nighttime. Additionally, thr

SUBMITTER: Moraes-Santos SP 

PROVIDER: S-EPMC11604352 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature