This is a contact recording of the Golden Gate Bridge on a clear day, February 26,2011. It’s the inner of the two safety handrails that follow the main cable on the east side of the bridge, tapped where it emerges after passing through through the southern concrete pier.

The original .WAV has been normalized but otherwise this is the raw thing. Turn on your sub to get the full rumble. Sprezza was along for the photo credits.

Cross-posted at wikiGong.com.