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User guide

32. average spectral period (or frequency) defined by

Rathje et al. (2004): .

33. PGV/PGA in seconds (or Hz) (the ratio is computed

using ms

-1

for PGV and ms

-2

for PGA), which gives an

indication of the period (or frequency) content of the

time-history;

At the top of this window there is a menu entitled ‘File’ with

three options: ‘Save figure’, which saves a copy of the window

as a graphics file (in .bmp, .eps, .jpg, .png or .tif format);

‘Print figure’, which prints a copy of the window; and ‘Export

values’, which exports the strong-motion parameters to a text

file in a space-delimited format.

Also given as a header to the strong-motion parameter table (if

the ‘Display metadata’ option is selected in the ‘Options’

window) are the basic earthquake, station and waveform

metadata corresponding to the selected time-history (if

available).

A typical strong motion analysis screen is shown overleaf.

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Guralp-systems ART Manual de usuario Pagina 33