py-nfi

Normalized frequency index (nFI) computation for earthquake source spectra

Compute the normalized frequency index (nFI) from earthquake spectra. nFI is a data-driven measure of the relative high-frequency content of a seismic source, providing an observation-based alternative to stress-drop estimation for characterizing source behavior at high frequencies.

This is an active project on GitHub, py-nfi.


Related projects:

California nFI

Ridgecrest nFI