@misc{indiciae6c7403866177,
  title = {Continued seismic monitoring of The Geysers, California, geothermal area},
  author = {R.S. Ludwin and C. G. Bufe},
  year = {1980},
  doi = {10.3133/ofr801060},
  url = {https://pubs.usgs.gov/publication/ofr801060},
  note = {Source identifier: ofr801060}
}