obspy.signal.trigger.carl_sta_trig

carl_sta_trig(a, nsta, nlta, ratio, quiet)

Computes the carlSTAtrig characteristic function.

eta = star - (ratio * ltar) - abs(sta - lta) - quiet

Parameters:

• a (NumPy ndarray) – Seismic Trace

• nsta (int) – Length of short time average window in samples

• nlta (int) – Length of long time average window in samples

• ratio – as ratio gets smaller, carl_sta_trig gets more sensitive

• quiet (float) – as quiet gets smaller, carl_sta_trig gets more sensitive

Return type:

NumPy ndarray

Returns:

Characteristic function of CarlStaTrig