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<H1><A ID="SECTION00020000000000000000"> SMA 1 Waveform Analysis</A> </H1> Since the Sand Point station was at an <EM>SH</EM> node, the vertical and horizontal components were combined to obtain the incident <EM>SV</EM> pulse shape by using the free surface transformation

<P></P> <DIV ALIGN="CENTER"> <!– MATH

usv(t) = $\displaystyle {\frac{{\cos 2j}}{{2 \cos j}}}$ux(t) + sin juz(t) (1)
–> <TABLE WIDTH="100<TR VALIGN="MIDDLE"><TD ALIGN="CENTER" NOWRAP> <I>u</I><SUB>sv</SUB>(<I>t</I>) = <IMG STYLE="height: 2.10ex; vertical-align: 175.09ex; " SRC="img1.png" ALT=" $\displaystyle {\frac{{{\cos 2j}}}{{{2 \cos j}}}}$"><I>u</I><SUB>x</SUB>(<I>t</I>) + sin&nbsp;<I>ju</I><SUB>z</SUB>(<I>t</I>) </TD> <TD WIDTH=10 ALIGN="RIGHT"> (1)</TD></TR> </TABLE> </DIV> Here <I>j</I> is the angle of incidence of the <EM>S</EM> save, and <I>u</I><SUB>x</SUB>(<I>t</I>) is the horizontal component (positive downward), shown in Figure 2. Fig. 2

<P> <BR><HR> <!–Table of Child-Links–> <A ID="CHILD_LINKS"><STRONG>Subsections</STRONG></A>

<UL> <LI><A NAME="tex2html7" HREF="node3_ct.html" TARGET="contents"><SMALL>Focal Mechanism of the Main Shocks</SMALL></A> <UL> <LI><A NAME="tex2html8" HREF="node4_mn.html" TARGET="main"><SMALL>Magnitudes and b value</SMALL></A> </UL></UL> <!–End of Table of Child-Links–>

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