Ground-based observation of a bright ELVE and the associated thunderstorm in high latitude inland region

The upper atmosphere is dynamically perturbed by the underlying thunderstorms and lightning, and the optical phenomena known as transient luminous events (TLEs) are one of the manifestations.  Up to now, TLEs includes sprites, elves, blue jets, blue starters, gigantic jets and halos, etc.  Due to the very short duration, dim brightness and very large horizontal scale (hundreds of kilometers), elves are very hard to be captured by ground-based cameras.  An elve event is recorded for the first time over inland region in Asia Continent on the night of 20 September 2016.  The elve is unusual bright with its parent lightning located about 505 km away from the camera.  The elve occurred in the parent thunderstorm dissipating stage with low cloud tops and the thunderstorm is located completely in inland region with relatively dry, stable and low shear environment, not documented so far.  The elve parent stroke is vertically aligned located in small thunderstorm cell with weak reflectivity.  Sferic waveforms suggest that the magnetic field of the elve parent stroke is the maximum among all the strokes during the storm life cycle.  The impulse and total charge moment change of the parent stroke is 617 and 3577 C km, respectively.  In addition, the elves parent stroke sferics exhibit unique wave train feature not available both in the sprite parent stroke and other strokes that did not produce TLEs in the same thunderstorm.