Coincident 1.3-year Periodicities in the Ap Geomagnetic Index and the Solar Wind

@inproceedings{Paularena1995Coincident1P,
  title={Coincident 1.3-year Periodicities in the Ap Geomagnetic Index and the Solar Wind},
  author={K I Paularena and Adam Szabo and J. D. Richardson},
  year={1995}
}
Recent observations show an approximately 1.3-year period in the speed of the solar wind detected by the IMP 8 and Voyager 2 spacecraft. A similar period is also seen in the north-south (GSE) component of the magnetic eld observed by IMP 8. Since both parameters are commonly used as input to models of geomagnetic activity, the ap index (a measure of geomagnetic disturbance) is examined to look for this periodicity. The Lomb-Scargle periodogram method is used on the ap, plasma, and magnetic eld… CONTINUE READING

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