Observation of the solar eclipse of 20 March 2015 at the Pruhonice station

Ionosphere Influenced From Lower-Lying Atmospheric Regions

“…Quasi-periodic changes in the virtual height of the ionospheric plasma with plasma frequency of 3-4 MHz start up after the first contact (left vertical line in Figure 14B) and persist for more than 4 h after the fourth contact (right vertical line in Figure 14B). This observation confirms that the wave activity triggered by the instability of ionospheric plasma due to rapid change in the absorbed solar energy persists several hours after the end of the disruption (Mošna et al, 2018).…”

“…In Central Europe, we had an opportunity to observe several partial solar eclipses. Their effects were reported in the studies by Šauli et al (2006a), Šauli et al (2007), Jakowski et al (2008), andMošna et al (2018). An exceptional case occurred on 11 August 1999 when the coverage of solar disk reached 98%, during uniform solar disk, steady solar wind, and in quiet magnetospheric conditions.…”

“…Šauli et al (2006a) detected waves with periods of 3-5 min (acoustic mode) and 15-40 min (gravity mode), and identified some modes propagating from the source region located around 200 km height, while other from the source, possibly in the ozone layer. Mošna et al (2018) analyzed the 2015 solar eclipse and using a combination of different ground methods, detected persistent AGW activity up to the height of 150-250 km with a dominant period of 65 min. Lin et al (2018) reported solar eclipse-induced waves with periods of 20-30 minutes in the TEC measurements that well-correspond to those derived by the Global Ionosphere-Thermosphere Model (GITM).…”

Enhancement of Electron Density in the Ionospheric F2 Layer Near the First Contact of the Total Solar Eclipse on 21 August 2017

“…Numerous studies examined the ionospheric wave or oscillation with periods ranging from few to dozens of minutes due to the solar eclipses (Altadill et al, 2001;Cheng et al, 1992;Chimonas, 1970;Coster et al, 2017;Liu et al, 1998Liu et al, , 2011Mošna et al, 2018;Mrak et al, 2018;Nayak & Yiğit, 2017;Sun et al, 2018;Sun, Shen, et al, 2021;Verhulst & Stankov, 2018;J. Wang et al, 2021;Zhang et al, 2017).…”

Height Dependency of Solar Eclipse Effects: The Ionospheric Perspective

“…Consequently, some eclipse effects on the ionosphere come with a delay, which can be quite substantial in some circumstances (Hoque et al, 2016;Stankov et al, 2017). In addition to the direct impact locally, that is, along the path of obscuration, a solar eclipse can induce far reaching wave-like phenomena traveling away from the path (Abidin Abdul Rashid et al, 2006;Afraimovich et al, 2000;Altadill et al, 2001;Mošna et al, 2018;Verhulst & Stankov, 2018). Considering the complex response of the ionosphere, it is of particular importance that an accurate calculation of key characteristics of solar eclipses-such as timing, locations, and levels of obscuration-is carried out, and preferably provided in advance.…”