A loud ‘boom’ - we thought initially a ww2 bomb or gas explosion - at which birds and animals throughout the valley all erupted into flight / chatter / baying etc. The house shook, as did parents’ up the road.
Delayed Sound
Observation
Yes
Remarks
A low ‘Boom’
Persistent train
Observation
Yes
Duration
99.99s
Length
-
Remarks
Photo attached: straightish , with some wisps where the tail / train was either blown or as it broke up perhaps?