Short-term periodicities in interplanetary, geomagnetic and solar phenomena during solar cycle 24

Abstract

In this paper we study the quasi-periodic variations of sunspot area/number, 10.7 cm solar radio flux, Average Photospheric Magnetic Flux, interplanetary magnetic field (B z ) and the geomagnetic activity index A p during the ascending phase of the current solar cycle 24. We use both Lomb-Scargle periodogram and wavelet analysis technique and find evidence for a multitude of quasi-periodic oscillations in all the data sets. In high frequency range (10 days to 100 days), both methods yield similar significance periodicities around 20-35 days and 45-60 days in all data sets. In the case of intermediate range, the significant periods were around 100-130 days, 140-170 days and 180-240 days The Morlet wavelet power spectrum shows that all of the abovementioned periods are intermittent in nature. We find that the well-known "Rieger period" of (150-160 days) and near Rieger periods (130-190 days) were significant in both solar, interplanetary magnetic field and geomagnetic activity data sets during cycle 24. The geomagnetic activity is the result of the solar wind-magnetosphere interaction. Thus the variations in the detected periodicity in variety of solar, interplanetary and geomagnetic indices could be helpful to improve our knowledge of the inter-relationship between various processes in the Sun-Earth-Heliosphere system.

Solar-rotational oscillation and its harmonics in the solar-wind, geomagnetic and cosmic ray particles during the last two solar minima

“…Shortterm periodicities of solar wind parameters are reported by many researchers e.g., Mursula and Zieger (1996), Nayar et al (2002), Katsavrias et al (2012), Singh et al (2012), Kim and Chang (2014), Singh and Badruddin (2014), Chowdhury et al (2015). Short-term oscillations of galactic cosmic ray (CR) particles are reported by Mavromichalaki et al (2003), Alania et al (2008), Chowdhury et al (2010), Sabbah and Kudela (2011), Kudela (2012), Singh et al (2012), Modzelewska and Alania (2013), Singh and Badruddin (2015), while short-term oscillations of geomagnetic indices are reported by Nayar et al (2002), Singh and Badruddin (2014), Chowdhury et al (2015) and many others. The variability of cosmic rays near earth is summarized by Kudela (2012).…”

Solar Rotational Oscillation and Its Subharmonics in Solar Wind Plasma Field, Geomagnetic, and Cosmic Ray Intensity Indicator in the Solar Cycle 24/25 Minimum

“…Short‐term periods like 20, 26, 29, 30, 32, and 34 day of Bz were reported by Chowdhury et al (2015) during 2009 to August 2014; 13.9, 28, and 30 day periods of Bz by Katsavrias et al (2012) during 1964–2010; 1.9, 3.3, 4.2, 8.8, 9.5, 13.4, 13.8, 27.5, and 28.3 day periods by Singh and Badruddin (2015a, 2015b) during solar minimum; 29 day by Gavryuseva (2018) in 2003; 13.9, 14.3, 27.8; and 28.5 day periods by Tsichla et al (2019) during 1995–2018. Recently, 3.9, 2.8, 2.4, 2.2, and 1.8 day periods of various solar wind plasma and field parameters have been reported by Singh and Badruddin (2019a) during the polarity reversal periods and 1.7, 1.8, 2.2, 3.3, and 3.8 day periods during solar minimum (Singh & Badruddin, 2015a, 2015b).…”

Large- and small-scale periodicities in the mesosphere as obtained from variations in O<sub>2</sub> and OH nightglow emissions

“…The reason behind the presence of these periodicities in SSN and F10.7 solar flux is the internal magnetic dynamo action in the solar interior. It has been shown that some of these periods are present in the solar magnetic flux variations during solar cycle 24 and may differ from year to year (Chowdhury et al, 2015). Hence, it can be seen from Fig.…”