@misc{indiciae8c66ed5a2aac,
  title = {Signatures of the seismic source in EMD-based characterization of the 1994 Northridge, California, earthquake recordings},
  author = {R.R. Zhang and S. Ma and S. Hartzell},
  year = {2003},
  doi = {10.1785/0120010285},
  url = {https://pubs.usgs.gov/publication/70025971},
  note = {Source identifier: 70025971}
}