\begin{table}%t1
\caption{\label{t1}Velocity and lifetime of dark ejections and  faint waves in
Figs.~\ref{space_time_fig} and \ref{mini_events_fig}.}
%\centering
\par
\begin{tabular}{c c c c} 
\hline\hline
Event& Feature & $V$ (km s$^{-1}$) & Lifetime (min) \\
\hline
1 & dark & 14 & 25 \\
2 & dark & 6 & 30 \\
  & wave & 26 & 40\\
3 & dark & 21 & 20\\
4 & wave & 41 & 19\\
5 & dark & 5 & 20\\
6 & dark & 19 & 45 \\
  & wave & 36 & 13 \\
7 & dark & 16 & 50 \\
& wave & 24 & 30\\
8 & wave & 100 & 6\\
9 & dark & 18 & 40 \\
10 & dark & 15 & 50 \\
   & wave& 50 & 30\\
11 & dark & 26 & 42 \\
& wave & 36 & 60\\
\hline
\end{tabular}
\end{table}