@misc{indiciae49a8ce17b468,
  title = {On the watch for geomagnetic storms},
  author = {Arthur W. Green and William M. Brown},
  year = {1997},
  doi = {10.3133/fs17797},
  url = {https://pubs.usgs.gov/publication/fs17797},
  note = {Source identifier: fs17797}
}