Observations of ULF waves in the solar corona and in the solar wind at the Earth's orbit

Spectrum of frequency modulation of serpentine emission as a reflection of the solar fluctuation spectrum

“…There also exist other features that might not be reflected in SE frequency pulsations, but nevertheless there is a close connection between processes on the Sun, such as proton flares, and dynamic SE spectrum variations [Dovbnya et al, 1994]. Furthermore, as inferred from experimental observations of Alfvén waves in near-Earth interplanetary space, there are 5-minute oscillations in their spectrum, which are clearly associated with 5-minute solar oscillations [Potapov et al, 2013]. The question about transformation of 5-minute solar surface oscillations into Alfvén wave energy and their possible contribution to the spectrum of frequency modulation of the serpentine emission has been discussed in detail in [Guglielmi et al, 2015].…”

ULF wave activity in high‐speed streams of the solar wind: Impact on the magnetosphere

“…They may be generated by plasma instabilities while HSSs travel from the Sun to the Earth's orbit, or these waves may be transported from coronal holes in the Sun's atmosphere, where they are often observed with a telescope as 3 and 5 min speed variations of solar plasma. The latter assumption was made in Potapov et al [2014].…”

Kinetic Alfven Waves Near a Dissipative Layer

“…Alfven waves are one of the key elements in the dynamics of the magnetospheric plasma (Agapitov & Cheremnykh, 2013; Potapov et al., 2013). The bulk of geomagnetic pulsations observed on Earth are Alfven waves coming from the magnetosphere to the ionosphere, which then penetrate the atmosphere and arrive at the Earth surface (Chelpanov et al., 2018; Dungey & Southwood, 1970; Pilipenko, 1990).…”