@misc{indiciaeebd92dbde215,
  title = {El Centro, California, differential ground motion array},
  author = {G. Noel Bycroft},
  year = {1980},
  doi = {10.3133/ofr80919},
  url = {https://pubs.usgs.gov/publication/ofr80919},
  note = {Source identifier: ofr80919}
}