The change in the magnitude of the atmospheric electric field (AEF) before the earthquake and immediately after it, according to our model, is due to the fact that the protons of water atmospheric complexes turn out to be quantum-entangled to protons of hydrogen bonds (HB) in lithosphere material. After the establishment of the quantum entanglement regime in the system, a decoherence follows. It manifests itself in AEF change, and then there is a recoherence, during which the quantum entanglement of the largest possible number of elements in the system with HB which ends with a new decoherence, is again tuned in the system. It is during this process that a shock wave or an earthquake entailing the change of AEF magnitude is generated.