@misc{indiciaeb969e0df5d58,
  title = {Ionospheric current source modeling and global geomagnetic induction using ground geomagnetic observatory data},
  author = {Jin Sun and Anna Kelbert and G. D. Egbert},
  year = {2015},
  doi = {10.1002/2015jb012063},
  url = {https://pubs.usgs.gov/publication/70182720},
  note = {Source identifier: 70182720}
}