The money quote:
But up on the 50th floor, the experience was terrifying. The building — equipped on each floor with seismic sensors — swayed back and forth for perhaps two to three minutes and as much as one foot in each direction, said Caltech research professor of civil engineering Monica Kohler.
On the 48th floor of another building in downtown Los Angeles, Beth M. Foley said she felt vertigo, and her husband motion sickness, after what seemed like minutes of swaying. Eventually, the building creaked and came to a stop. The couple said they plan to pack anti-nausea medications in their earthquake kit. “These things swayed like loblolly pines in a storm,” Foley said.
“That’s going to do a number on your brain,” Kohler said. “Seasickness is something you get when you’re in these high-rises.”
# # #