“…Plasma bubbles contain plasma density irregularities (Booker & Wells, 1938; Woodman & La Hoz, 1976) and have field‐aligned structures connecting the Northern and Southern Hemispheres (Martinis & Mendillo, 2007; Otsuka et al., 2002; Tsunoda, 1980a). There are many studies conducted on plasma bubbles using ionosondes (Abdu et al., 2003), all‐sky imagers (Otsuka et al., 2002; Martinis & Mendillo, 2007), VHF radars (Ajith et al., 2015; de Paula et al., 2019; Saito et al., 2008; Tulasi Ram et al., 2008, 2017; Woodman & La Hoz, 1976), and global navigation satellite system (GNSS) networks (Cherniak & Zakharenkova, 2016; Li et al., 2018; Ma & Maruyama, 2006; Otsuka et al., 2021; Sori, Shinbori, et al., 2022; Sori, Otsuka, et al., 2022; Valladares et al., 2004).…”