Magnetic pulsations are extremely low frequency disturbances in the Earth's magnetosphere driven by its interactions with the solar wind. These variations in the planet's magnetic field can oscillate for multiple hours when a solar wind driving force strikes a resonance. This is a form of Kelvin–Helmholtz instability. The intensity, frequency, and orientation of these variations is measured by Intermagnet.
In 1964, the International Association of Geomagnetism and Aeronomy (IAGA) proposed a classification of magnetic pulsations into continuous pulsations (Pc) and irregular pulsations (Pi).
References
- ^ "Magnetic pulsations". Retrieved 2021-01-20.
- ^ "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."
- McPherron, R.L. (2005). "Magnetic Pulsations: Their Sources and Relation to Solar Wind and Geomagnetic Activity". Surv Geophys. 26 (5): 545–592. Bibcode:2005SGeo...26..545M. doi:10.1007/s10712-005-1758-7. S2CID 122004707.
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