REP06359

• Permit No: M1997014
• IBM Index Class Name: Report
• Doc Date: 6/6/1997
• Doc Name: GROUND MOTION SURVEY OF THE DEER CREEK CANYON QUARRY
• Media Type: D
• Archive: No

_~
' ~~INTERPRETATION
~.'
••Maximum peak particle velocities for each of the monitoring aites
~~,-•~.~ 4~~were calculated. Each seismograph channel recorded one com-
•~ ~s~"ponent of ground motion. The maximum particle velocity is the
~-"'`~ {"`'``•;yvector sum of the three component velocities. The maximum •
~'~"°`'•~`~,rvelocity is calculated by the formula
..~~a Y%.~, i
r,,.~ ~ • ~`~ ~.
•''i'ti~ 2 2 2 ~,
:N 1••~.. ~ ;~.
:,.~' ';;y;"4,rhere: Vm =maximum peak particle velocity
'~.
_-,~~_' VL =measured longitudinal velocity
~~ .... .
•' :. ;'
;~ .
-yr:'•:3 VT =measured transverse velocity
"~'~..='' '' and V =measured vertical velocity
'~.r V
'r~~', This method of calculation yields a conservative maximum velocity
. ~ir,~,
i~~ 7 4 ~;i'•' •'
~*R~ r.because it assumes that all three components have peak velocities
'2.i:~~
'~,~,i~'":' ~~simultaneously. In fact, the three component velocities are out
.• `~+' .
•~ •~;7•+~+of phase and the vector sum will be higher than the actual max- ,
~•
~~'',~'•t•" imam peak particle velocity. At sites where only a single compo-
~k__
~_:... "nent was measured, a. conservative estimation of the maximum
' ,,velocity was determined by multiplying the measured velocity by 2.
3 ~ti:.. ~
~•*~a~r•_ The maximum interpreted peak particle velocities for the four
~~.._ ~~
~x ~ ~monitoring•.eites are shown in Table 4.
O'r..'~~ ~~ , '
.''`~;* ~r.+~ TABLE 4
®~`~+ `~ i
a ~ SITE MAXIMUM PEAK PARTICLE VELOCITY
~ ~F~
~~ ' House 0.08 in/sec
a ~~~:.~
~`~
• ~.,, ,,;~ ~ Overhang 0.24 •'
•• ~,.:;.
~" Ridge 0.44
,;~. '~
=~~ ~ Conveyor 0.82
.. ~.. ~ .r„ J'.
,,.•~ ~r° f r~
~r,_r~::_~~, MICROGEOI'HYSICS