Observations by snapperdg

Heard in the distance on a windy morning when I was on the footpath along the South Drain about 250 metres east of RSPB Ham Wall car park. Unable to record the booming which I heard several times coming from roughly the same direction and distance over a period of about 90 minutes following the first hearing at 10.55. The location given for this observation is simply my best guess of where it might have been coming from.