Observation of the intercloud discharge induced by an extensive air shower in a thunderstorm atmosphere

The observational evidence of RB-EAS discharge in a thunderstorm atmosphere is presented. After RB-EAS discharge we name a discharge of a special type developing due to the runaway breakdown (RB) mechanism while an extensive atmosphere shower (EAS) passes through a thundercloud electric field. The observations were fulfilled at the Tien-Shan Mountain Cosmic Ray Station. The widely spread system of scintillation detectors, the special EAS trigger array and the HF radio interferometer were used for measurements.