@misc{indiciae48d080ba9a1e,
  title = {Moment-tensor solutions estimated using optimal filter theory: global seismicity, 1992},
  author = {S.A. Sipkin and R.E. Needham},
  year = {1994},
  doi = {10.1016/0031-9201(94)90097-3},
  url = {https://pubs.usgs.gov/publication/70017718},
  note = {Source identifier: 70017718}
}