Watch the Tuned Mass Damper inside a Taipei skyscraper react to this weekend's 6.9-magnitude earthquake

The 660 metric ton Tuned Mass Damper within the Taipei 101 skyscraper moves effortlessly in the video above as a 6.9 magnitude earthquake rocked Taiwan on September 18, 2022, but the Taipei 101 skyscraper has weathered worse, like the time the Tuned Mass Damper traveled 100 centimeters during Typhoon Sudila on August 8, 2015:

Essentially acting as a giant pendulum, the enormous steel sphere moves slightly back and forth to counter any motion of the building itself.