@misc{indiciae250841c41ce4,
  title = {Tsunami seismic system},
  author = {Harold E. Clark and Edward S. Medina},
  year = {1976},
  doi = {10.3133/ofr76777},
  url = {https://pubs.usgs.gov/publication/ofr76777},
  note = {Source identifier: ofr76777}
}