Magnetic pulsations

Magnetic pulsations are extremely low frequency disturbances in the Earth's magnetosphere driven by its interactions with the solar wind.[1] These variations in the planet's magnetic field can oscillate for multiple hours when a solar wind driving force strikes a resonance.[2] This is a form of Kelvin–Helmholtz instability.[1] The intensity, frequency, and orientation of these variations is measured by Intermagnet.[2]

In 1964, the International Association of Geomagnetism and Aeronomy (IAGA) proposed a classification of magnetic pulsations into continuous pulsations (Pc) and irregular pulsations (Pi).[1][3]

References
  1. "Magnetic pulsations". Retrieved 2021-01-20.
  2. "A MUSICAL NOTE FROM THE MAGNETOSPHERE". High above the Arctic Circle in Lofoten, Norway, citizen scientist Rob Stammes operates a space weather monitoring station. His sensors detect ground currents, auroras, radio bursts, and disturbances in Earth's magnetic field. Yesterday, he says, "I received a musical note from the magnetosphere."
  3. McPherron, R.L. (2005). "Magnetic Pulsations: Their Sources and Relation to Solar Wind and Geomagnetic Activity". Surv Geophys. 26: 545–592. doi:10.1007/s10712-005-1758-7.
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