It looks like the sound of a far ligthning. The sound was deep and much more intense than a plane plane sound.
Delayed Sound
Observation
Unknown
Remarks
-
Persistent train
Observation
Yes
Duration
10s
Length
25°
Remarks
It was a glowing train with a white and blue colour. From my point of view, the train was located in Cepheus constellation. It started right above Iota Cephei and went down toward Alpha Cephei (Alderamin). The train was not unbroken. I noticed one important discontinuity (maybe 2 or 3 degrees) and a smaller dicontinuity. I could not see the end of thre train because of trees.
