Steps to analyse teleseismic events
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read in appropriate data window
choose filter which provides good signal/noise ratio (WWSSN-SP)
determine slowness and azimuth of incoming wave (a) using
manually picked first arrivals, then call Plane Wave,
(b) using first visible
minimum/maximum automatically picked, then call Plane Wave,
or (c) using FK algorithm.
check resulting slowness and azimuth using the Beam option
of SHM, if necessary correct
phase readings
pick first arrival phase (P, PKP) on reference station, add
phase readings on other stations if desired
calibrate slowness and azimuth if calibration vectors are
available (e.g. for GRF) using menu entry Calibration
call menu entry Locate
Tele and locate event
if depth phases are visible, pick them and determine focal
depth (menu entry Depth).
Relocate event (Locate
Tele) with new depth.
read maximum amplitude on first arrivals picked (WWSSN-SP
simulation filter, menu entry Ampl
& Period auto Peak)
determine magnitudes mb (menu entry mb)
reread event in a longer time window to see possible surface
waves. Use only vertical component of reference station
choose SRO-LP simulation filter, adjust cutoff time to at
least 5 min.
use menu entry Surface
Ampl automatic and select window of surface wave train
on vertical component to determine amplitude and period of surface
waves
determine Ms using menu entry MS
Prague
select menu entry Final Parameters to save results to file