reply to post by quedup
I was looking for more information on the Knoxville sounds thread as well, and also saw reports of what was happening in Costa Rica... Thanks
for creating the thread.
A news report on the Costa Rica hum is well worth the watch (or listen), despite it not being in English. Near the end of the report, they seem to
liken it to the booming sounds heard in Colorado before an earthquake back in August 2011 - Comparing that incident to the audio in the report from
Costa Rica, it's eerily similar. I will embed the first video from your link and the related news report.
Raw Audio
Costa Rica Hum News Report (Spanish)



