Advancing earthquake science worldwide
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 »
27 September 2022–Trapped inside the shoreline of a bay, the resonant interactions of a tsunami with regular waves can prolong the tsunami disturbance. For the 2021 magnitude 7 Acapulco, Mexico earthquake and tsunami, edge waves in the bay and the short continental shelf also had a surprisingly significant effect on … Continue Reading »
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 »
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 »
6 July 2022–Researchers used a fiber optic cable on the ice cap of an Icelandic subglacial volcano to detect low-frequency volcanic tremor, suggesting this technology could be useful in monitoring other ice-covered volcano systems. Their research published in The Seismic Record indicates that the floating ice cap, part of the … Continue Reading »
28 June 2022–An active underground mine can be a seismically noisy environment, full of signals generated by heavy machinery at work and induced seismicity. Now, researchers working with data from a longwall coal mine demonstrate a way to extract and separate the signals generated from mining activity from the background … Continue Reading »