5.2.14.1.2. eqcorrscan.utils.synth_seis.seis_sim

eqcorrscan.utils.synth_seis.seis_sim(sp, amp_ratio=1.5, flength=False, phaseout='all')[source]

Generate a simulated seismogram from a given S-P time.

Will generate spikes separated by a given S-P time, which are then convolved with a decaying sine function. The P-phase is simulated by a positive spike of value 1, the S-arrival is simulated by a decaying boxcar of maximum amplitude 1.5. These amplitude ratios can be altered by changing the amp_ratio, which is the ratio S amplitude:P amplitude.

Note

In testing this can achieve 0.3 or greater cross-correlations with data.

Parameters:

  • sp (int) – S-P time in samples

  • amp_ratio (float) – S:P amplitude ratio

  • flength (int) – Fixed length in samples, defaults to False

  • phaseout (str) – Either ‘P’, ‘S’ or ‘all’, controls which phases to cut around, defaults to ‘all’. Can only be used with ‘P’ or ‘S’ options if flength is set.

Returns:

Simulated data.

Return type:

numpy.ndarray