\begin{table}%t2
%\centering
\par
\caption{\label{tab:fluxes}Temporal maximum of the horizontally averaged, vertical component of the 
wave-energy fluxes for the strong field case.}
\begin{tabular}{lrrrrrrr}
\hline\hline
&& \multicolumn{3}{c}{$F_{A,z}$ ($10^{6}$~erg~cm$^{-2}$~s$^{-1}$) } 
& \multicolumn{3}{c}{$F_{P,z}$ ($10^{6}$~erg~cm$^{-2}$~s$^{-1}$)\rule[-4pt]{0pt}{14pt}}  \\ 
\cline{3-8}
\multicolumn{2}{l}{Initial excitation\rule{0pt}{10pt} }& $z=100$~km & $z=500$~km & $z=1000$~km 
& $z=100$~km & $z=500$~km & $z=1000$~km  \\
\hline
0.75~km~s$^{-1}$, &   24~s \rule{0pt}{10pt}& 11.36  & 1.96  & 1.33 & 29.38 & 1.08 & 0.14\\
0.75~km~s$^{-1}$, & 120~s & 35.75 & 27.70 & 4.02 & 134.29 & 0.79 & 0.07\\
0.75~km~s$^{-1}$, & 240~s & 20.90 & 8.58 & 3.30 & 131.84 & 0.36 & 0.02\\
1.50~km~s$^{-1}$, &   24~s & 44.55  & 7.68  & 3.34 & 115.79 & 4.29 & 0.57\\
3.00~km~s$^{-1}$, &   24~s & 168.41 & 30.40 & 6.22 & 434.03 & 16.90 & 2.31\\
\hline
\end{tabular}
\end{table}