Guralp Systems ART - Manual (Page 41)

User guide
graphical formats (.bmp, .eps, .jpg, .png or .tif) using the
‘Save figure’ option on the ‘File’ menu and printed using the
‘Print figure’ option the ‘File’ menu.
The values plotted can also be saved in a column format using
the ‘Export data’ option on the ‘File’ menu. The options used to
create the figure can be changed within the ‘Options’ menu
located at the top of the window.
The normalized energy densities are displayed using units
based on the selected velocity unit.
Single time-history selected
Clicking on this button will calculate and display the normalized
energy density plot [i.e. energy density against time (Sarma,
1971)] of the currently selected time-history. The left hand axis
gives the normalized energy density [note that, to get the true
energy density, the normalized energy density should be
multiplied by Vρ/4 where V is wave velocity and ρ is mass
density (Sarma, 1971)] and the right hand side gives the
percentage of normalized energy density. Also displayed on the
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