@misc{indiciae13d9725cc578,
  title = {On the modified Mercalli intensities and magnitudes of the 1811-1812 New Madrid earthquakes},
  author = {S. E. Hough and J.G. Armbruster and L. Seeber and J.F. Hough},
  year = {2000},
  doi = {10.1029/2000jb900110},
  url = {https://pubs.usgs.gov/publication/70022358},
  note = {Source identifier: 70022358}
}