Dark Fiber Helps Pick Up Acoustic Signals of Iceland 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 »

Hidden Microearthquakes Illuminate Large Earthquake-Hosting Faults in Oklahoma and Kansas

injection well head

26 August 2022–Using machine learning to sift through a decade’s worth of seismic data, researchers have identified hundreds of thousands of microearthquakes along some previously unknown fault structures in Oklahoma and Kansas. The newly identified microearthquakes allowed the seismologists to map and measure earthquake clusters in the region, which has … Continue Reading »

Haiti’s 1860 Jour de Pâques Earthquakes May Have Released Strain in Key Fault Zone

1860 Richmond newspaper clipping

12 July 2022–Using details from historical newspaper accounts and letters, seismologists have learned more about Haiti’s 1860 Jour de Pâques (Easter Sunday) earthquake sequence, and how it might have impacted the country’s most recent devastating earthquakes. The new analysis published in the Bulletin of the Seismological Society of America suggests … Continue Reading »