@misc{indiciaea29e75afa819,
  title = {Aftershocks of the Loma Prieta earthquake; computer animations},
  author = {F. W. Klein and S.R. Walter},
  year = {1989},
  doi = {10.3133/ofr89669},
  url = {https://pubs.usgs.gov/publication/ofr89669},
  note = {Source identifier: ofr89669}
}