Extreme events in the forced Lienard system

We observe extremely large amplitude intermittent spikings in a dynamical variable of a periodically forced Lienard-type oscillator and characterize them as extreme events, which are rare, but recurrent and larger in amplitude than a threshold. The extreme events occur via two processes, an interior crisis and intermittency. The probability of occurrence of the events shows a long-tail distribution in both the cases. We provide evidence of the extreme events in an experiment using an electronic analog circuit of the Lienard oscillator that shows good agreement with our numerical results.