@misc{indiciaec2ce0e01493e,
  title = {Variable-period surface-wave magnitudes: A rapid and robust estimator of seismic moments},
  author = {J. Bonner and R. Herrmann and H. Benz},
  year = {2010},
  doi = {10.1785/0120090388},
  url = {https://pubs.usgs.gov/publication/70037569},
  note = {Source identifier: 70037569}
}