Magnetic Oscillations Pc4
Taken by Rob Stammes on February 22, 2018 @ Polarlightcenter Lofoten Norway.
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Feb.22 2018 This morning Pc4 pulsations on my ground current instruments.Very stable oscillation signals for more than one hour with a period of time of 100 seconds.
Pulsating continuous signals visible 2 or 3 times a year,sometimes as Pc3 or Pc5 oscillations.
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