Earthquake chimes

I just finished Clock Of The Long Now: Time And Responsibility: The Ideas Behind The World's Slowest Computer, which was a fun and interesting (if ever so slightly wankery) read. It offhandedly mentioned a really amazing idea: earthquake chimes! This conjured some very impressive mental images of a rack of suspended I-beams, or church-bell-sized ingots in a delicate whiffletree arrangement, just waiting for an earthquake large enough to set them in motion.

Sadly, I don't a set has ever been made. I did find reference to a "seismofon" installation at a museum. They are computer controlled to react to earthquakes anywhere in the world. Neat, but not of any particularly inspiring dimension.

If anyone has an atrium they need filling, I think you should really consider this option.