Guralp-systems ART Manual do Utilizador descarregar pdf (Página 37)

User guide

Also shown in this figure (if the ‘Display metadata’ option is

selected in the ‘Options’ window) are the basic earthquake,

waveform and station metadata of the selected time-history.

3.2.14 Particle motions

When two or three components of the same record are

selected the particle motions button becomes active. Clicking

on this button produces a plot of the motion of a particle

(hodogram) at the station using the acceleration, velocity and

displacement of the two or three time-histories.

If two time-histories are selected a 2D plot is created with three

graphs:

• the left-hand graph shows the acceleration of the first

component (on the x-axis) against the acceleration of

the second component (on the y-axis);

• the middle graph shows the velocity of the first

component (on the x-axis) against the velocity of the

second component (on the y-axis); and

• the right-hand graph shows the displacement of the

first component (on the x-axis) against the

displacement of the second component (on the y-axis).

If three time-histories are selected a 3D plot is created with

three graphs:

• the left-hand graph shows the acceleration of the first

component (on the x-axis) against the acceleration of

the second component (on the y-axis) and the

acceleration of the third component (z-axis);

• the middle graph shows the velocity of the first

component (on the x-axis) against the velocity of the

second component (on the y-axis) and the velocity of

the third component (z-axis); and

• the right-hand graph shows the displacement of the

first component (on the x-axis) against the

displacement of the second component (on the y-axis)

and the displacement of the third component (z-axis).

The order of the components is always the same as that given

in the list of time-histories currently in memory. When three

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Guralp-systems ART Manual do Utilizador Página 37