Dark Fiber Helps Pick Up Acoustic Signals of Iceland Meteoroid

meteoroid

17 November 2022–Data collected by a large-N seismic array and distributed acoustic sensing (DAS) in Iceland offer one of the most detailed acoustic fingerprints of a meteoroid entering and disintegrating in the atmosphere. The dense record, described in Seismological Research Letters, allowed the researchers to distinguish acoustic phases that are … Continue Reading »

Caltech Hall Is Getting Stiffer, According to Decades of Data

Caltech Hall

11 November 2022–Caltech Hall, a 55-year-old nine-story reinforced concrete building on the Caltech campus, has been getting structurally stiffer over the past 20 years, according to a new report published in The Seismic Record. Previous work by seismologists and engineers had documented the building softening—that is, decreasing in stiffness—from its … Continue Reading »

At Work: Fan-Chi Lin

Fan-Chi Lin at geothermal spray

28 October 2022–Fan-Chi Lin likes to travel. Some of his favorite destinations are the U.S. national parks, “and I’ve always been curious about how seismology can help us to learn more about the geological features we observe there,” he said. Now, one of his largest research projects involves one of … Continue Reading »

At Work: Xiaohua (Eric) Xu

Eric Xu at Ridgecrest site

30 September 2022–“Geodesy is quite an old research field that started pretty much when humans wanted to measure the Earth, but it is also very new, especially since the rise of space-borne radar techniques,” said Xiaohua (Eric) Xu. “Space geodesy has helped scientists to measure not just the shape, but … Continue Reading »

At Work: Andrea Bryant

Andrea Bryant

31 August 2022–Andrea Bryant came to her work with NASA’s Dragonfly mission through what she calls “a beautiful accident.” Quarantining by herself in a tiny studio apartment in 2020, the University of Chicago graduate student was looking for a NASA internship that might fit with her exoplanet studies. A posting … Continue Reading »