Category: BSSA

3 December 2021–Three-dimensional fault models are generally more accurate than two-dimensional line models at sending ground shaking alerts to the correct areas as part of an earthquake early warning system, according to a new study. The benefits of 3D fault models vary depending on the fault style (a strike slip … Continue Reading »

30 November 2021–About 1000 days after the Mars InSight mission deployed SEIS, the first seismometer on the red planet, researchers are analyzing new seismic data and reporting on instrument responses, using these data to plan for future planetary seismographs. The reports in a special issue of the Bulletin of the … Continue Reading »

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 »

10 August 2021–Earthquakes generated by controlled fluid injection at Colorado’s Rangely oil field were caused by destabilizing fault pore pressure changes, according to a new mechanistic model applied to data from the decades’ old project The Rangely experiment, conducted from 1969 to 1973, is one of the oldest studies of … Continue Reading »

15 June 2021–For the first time, researchers have used precariously-balanced rocks to set the formal design earthquake motions for a major existing engineered structure—the Clyde Dam, the largest concrete dam in New Zealand. Mark Stirling of the University of Otago and colleagues identified and assessed the ages of these gravity-defying … Continue Reading »