@misc{indiciae8687cfd487f1,
  title = {Modified GIC estimation using 3-D Earth conductivity},
  author = {Anna Kelbert and Greg M. Lucas},
  year = {2020},
  doi = {10.1029/2020sw002467},
  url = {https://pubs.usgs.gov/publication/70223126},
  note = {Source identifier: 70223126}
}