Time domain processing:
integrate: int
integratemaxposneg: intmpn
integrates abs val of positive and negative values separately, loads case with maximum integral into samples (use for Mwpd magnitude)
integratemaxposneg: intmpnpk
integrates abs val of positive and negative values separately, loads case with maximum integral for a single pulse into samples (use for Mwp magnitude)
differentiate: dif
removemean: rmean [lb <n_points_from_begin_to_use>] | [ref1 offset1 ref2 offset2]
removetrend: rtrend
A least squares curve fit of a straight line to the data is calculated; this straight line or trend is then subtracted from the data.
cutinmemory: cutim [ref1 offset1 ref2 offset2]
where ref1 and ref2 are time in sec from trace reference time or features on traces (B,E,O, WINDOW_CENTER, WINDOW_START, WINDOW_END or phase/pick label)for begin and end of cut; offset1 and offset2 are offsets in sec from ref1 and ref2, respectively.
smooth: smo [type TRIANGLE | BOXCAR] [ha <window_half_width_in_samples>]
square: sqr
squareroot: sqrt
log: natural logarithm
log10: logarithm base 10
normalize: norm
multiply: mul [v1] <value>
divide: div [v1] <value>
add: add [v1] <value>
subtract: sub [v1] <value>
chop: chop
chops negative parts of a trace: sets all samples with value < 0.0 to 0.0
geomspread: rgain [freq <freq>]
remove response from a trace using constant gain given frequency response function evaluated at a specified frequency
geomspread: gs
multiplies trace by P wave geometrical spreading factor (Aki & Richards, eq. 9.44). Requires that GSARC and DEPTH header variables are set
and that a TauP model is available (see Phases Toolbar and -taup.* arguments)
multlinear: mlin v1 <value_at_begin> v2 <value_at_end>
instper: iper [alpha <alpha>]
implementation of the Allen-Kanamori instantaneous-period algorithm (Allen and Kanamori (2003), The Potential for Earthquake Early Warning in Southern California, Science, 300, 786-789.)
instperwin: iperw [win <nnn>]
implementation of the instantaneous-period algorithm using the Tau_c (windowed) algorithm of Kanamori, H. (2005). Real-time seismology and earthquake damage mitigation. Annual Review of Earth and Planetary Sciences 33, 195–214.
zerocrossperiod: zcper
estimates the dominant signal period based on the time between successive zero crossings.