by Wayne Harrison » May 28, 2013 6:51 pm
This topic really grabbed my interest because I heard what sounded like "rocks" moving (a single rock move, not a sustained rock move) while alone in a Colorado cave while waiting for the rest of the group to return from a 2 or 3 hour trip further in than I wanted to go that day.
I sat in a large room (at one end) that led into other areas and heard 3 or 4 distinct rock moves over a 2-hour period. I thought of it as a "living" cave that still has things move, for whatever reason. I wondered why I never heard it before but then I realized I'd never been sitting quietly in a cave for that length of time.
I wonder if anyone has looked into cave sounds over an extended period of silence -- maybe recording so the sounds could be played back?