It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
originally posted by: neo96
Absence of evidence.
Aircraft would be gone by the time you begin to hear it.
originally posted by: Moresby
Could have been a sonic boom. The sound they produce varies. From something not much louder than thunder to a booming concussive blast.
It might just have been thunder. And there are many other natural explanations.
But it might have had a more mysterious cause.
What do you think it is?