Imagine feeling the Ridgecrest earthquake from the 50th floor of a downtown L.A. skyscraper.
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.
“That’s going to do a number on your brain,” Kohler said. “Seasickness is something you get when you’re in these high-rises.”— the strongest with a Southern California epicenter in the age of the internet and smartphones — is providing scientists a trove of remarkable data. An effort by Caltech that began eight years ago, called the Community Seismic Network, has resulted in the installation of 1,000 sensors across the region, on buildings owned by the Los Angeles Unified School District, USC and Caltech as well as other privately owned buildings. Having the devices — which were funded by the National Science Foundation, the Conrad N. Hilton Foundation and Computers & Structures Inc.
U.S. Geological Survey seismologist Rob Graves said he felt something similar in Pasadena, about 100 miles from the epicenter — one wave of shaking comes through, then dies down, only to be followed by another.
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