  We analyze the time series of H$\alpha$ line obtained from Hinode/SOT on the
solar limb. The wavelet analysis shows that there are nice correlations between
dynamical properties of the two parts of a double spicule. The dominant periods
for height variations are estimated ~90 and ~180 s. The length of two parts of
the spicule oscillates with the period of around ~180 s. The mean distance
between two parts of the spicule has a periodical treatment with the period of
~90 s. Our results show that the strong pulses may lead to the quasi periodic
rising of chromospheric plasma into the lower corona in the form of spicules.
The periodicity may result from the nonlinear wake behind the pulse in the
stratified atmosphere.
