@misc{indiciaeaaccd591d267,
  title = {Geomagnetic Activity Indicates Large Amplitude for Sunspot Cycle 24},
  author = {Hathaway, D. H. and Wilson, R. M.},
  year = {2006},
  url = {https://ntrs.nasa.gov/citations/20060025555},
  note = {Source identifier: 20060025555}
}