Ridgecrest earthquake swayed L.A. skyscrapers more than a foot and caused vertigo

Data from seismic sensors in buildings across Southern California show how the 7.1 Ridgecrest earthquake produced surprisingly long periods of shaking in some areas.

from California https://www.latimes.com/california/story/2019-08-14/ridgecrest-earthquake-produced-minutes-of-shaking-new-story
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