Historical Detective Work Locates Epicenter for 125-Year-Old Large Indian Earthquake

Shillong house collapse

19 November 2021–With data unearthed from seismic stations, observatories and libraries across the world, researchers have pinpointed the location of a massive earthquake that took place in India 125 years ago—one of the largest intraplate earthquakes known to history. The magnitude 8 Great 1897 Shillong Plateau earthquake, sometimes called the … Continue Reading »

David J. Wald Selected as 2022 Joyner Lecturer

David Wald

15 November 2021–The Earthquake Engineering Research Institute (EERI) and the Seismological Society of America (SSA) are pleased to announce that David J. Wald, a seismologist with the U.S. Geological Survey’s National Earthquake Information Center (NEIC) in Golden, Colorado, is the 2022 recipient of the William B. Joyner Lecture Award. Wald … Continue Reading »

C.B Crouse Awarded 2022 Bolt Medal

CB Crouse

15 November 2021–The Earthquake Engineering Research Institute (EERI), the Consortium of Organizations for Strong Motion Observation Systems (COSMOS), and SSA are pleased to announce that C.B. Crouse, principal engineer at AECOM, is the recipient of the 2022 Bruce Bolt Medal. The award will be presented at the 12th National Conference … Continue Reading »

At Work: Gilead Wurman

Gilead Wurman

3 November 2021–Seismic hazard analyses may use ergodic ground motion models—a sort of “average” based on global data about ground motion—or non-ergodic models, which incorporate more local and regional data on seismic source and nearby geologic structures. Having that site-specific analysis can make a big difference, as consulting seismologist Gilead … Continue Reading »

“Beach Ball” Representations Calculated for U.S. Underground Nuclear Tests Can Aid Monitoring

Nevada National Security Site

21 September 2021–Researchers at Lawrence Livermore National Laboratory have calculated moment tensors for 130 underground nuclear and 10 chemical test explosions that took place at the Nevada National Security test site. Often represented graphically to resemble a striped “beach ball,” moment tensors “are essentially a mathematical concept that’s used to … Continue Reading »