@misc{indiciaec1db1d4652bd,
  title = {Hilbert-Huang transform analysis of dynamic and earthquake motion recordings},
  author = {R.R. Zhang and S. Ma and E. Safak and S. Hartzell},
  year = {2003},
  doi = {10.1061/(asce)0733-9399(2003)129:8(861)},
  url = {https://pubs.usgs.gov/publication/70025792},
  note = {Source identifier: 70025792}
}