4.4.1.5. eqcorrscan.utils.clustering.cross_chan_coherence

eqcorrscan.utils.clustering.cross_chan_coherence(st1, st2, allow_shift=False, shift_len=0.2, i=0)[source]

Calculate cross-channel coherency.

Determine the cross-channel coherency between two streams of multichannel seismic data.

Parameters:
  • st1 (obspy.core.stream.Stream) Stream one
  • st2 (obspy.core.stream.Stream) Stream two
  • allow_shift (bool) Whether to allow the optimum alignment to be found for coherence, defaults to False for strict coherence
  • shift_len (int) Samples to shift, only used if allow_shift=True
  • i (int) index used for parallel async processing, returned unaltered
Returns:

cross channel coherence, float - normalized by number of channels, and i, where i is int, as input.

Return type:

tuple