https://www.miragenews.com/champlain-towers-south-investigation-completes-865348/
Champlain Towers South Investigation Completes Site Testing, Announces Next Advisory Committee...
The Thumper, a mini "mobile shaker," custom-built at the University of Texas at Austin, sent waves of specific frequencies into the ground at the site
champlain towers southsite testinginvestigationcompletes