@misc{indiciae55e8a2bd2455,
  title = {Map showing global distribution of seismicity, 1977-1986, prepared by National Earthquake Information Center, World Data Center A for Seismology},
  author = {S.K. Goter},
  year = {1988},
  doi = {10.3133/gp989},
  url = {https://pubs.usgs.gov/publication/gp989},
  note = {Source identifier: gp989}
}