Abstract
Explosive instability is found for the first time to exist in the final stage of the evolution of thermomagnetic disturbances in type-II superconductors. The new mechanism — nonlinear of two thermomagnetic shock waves — is shown to be responsible for the explosive critical state dynamics in superconductors. The magnetic flux penetration speed is determined, the explosive stage duration time is evaluated. Estimations are made for the experimental observation of the explosive instability in macroscopic superconducting samples.
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