Periodic bursts of Jovian non-Io decametric radio emission

► We analyze the new type of periodic bursts of Jovian decametric radio emission. ► The bursts exhibit periodicity that is a 1.5% longer than Jupiter rotation rate. ► Occurrence of the periodic bursts strongly correlated with the solar wind pulses. ► We have shown that the sources of these bursts sub-corotate with Jupiter. ► We suggest that the bursts are related with interchange instability in Io torus.