Ivan Magrin-Chagnolleau and Richard G. Baraniuk.
Empirical mode decomposition based frequency attributes.
Proceedings of the 69th SEG Meeting, Houston, Texas, USA, 1999.

Abstract: This paper describes a new technique, called 
Empirical Mode Decomposition (EMD), which allows the decomposition of
one-dimensional signals into intrinsic oscillatory modes. Each component,
called Intrinsic Mode Function (IMF), has nice properties which
allow the calculation of a meaningful instantaneous frequency.
Applied to a seismic trace, this technique allows to study the
different intrinsic oscillatory modes of the seismic trace, and
to study the instantaneous frequency of these different modes.
Applied to a seismic section, it provides new frequency attributes.