Advancing earthquake science worldwide
22 April 2022–Sediment cores from the ancient Lake Cahuilla at Coachella in southern California could help seismologists determine whether lake filling events are connected to earthquakes on the Southern San Andreas Fault, according to a presentation at the Seismological Society of America’s Annual Meeting. Lake Cahuilla was a prehistoric lake … Continue Reading »
22 April 2022–The seismometer placed on Mars by NASA’s InSight lander has recorded its two largest seismic events to date: a magnitude 4.2 and a magnitude 4.1 marsquake. The pair are the first recorded events to occur on the planet’s far side from the lander and are five times stronger … Continue Reading »
22 April 2022–Like many people, geophysicist Patricia Persaud had big plans for March 2020. She and her students from Louisiana State University were ready to board a plane to install a geophone array in Yangon, Myanmar in collaboration with university professors and students in the city. COVID-19 grounded Persaud and … Continue Reading »
22 April 2022–Sediment cores drawn from the Salmon River Estuary in Oregon suggest that at least 15 meters of megathrust slip happened offshore during the massive 1700 Cascadia earthquake, leading to a meter or more of coastal subsidence, researchers said at the Seismological Society of America’s Annual Meeting. The findings … Continue Reading »
22 April 2022–Earthquake aftershocks form spatial clusters around a mainshock, instead of evenly surrounding the mainshock. Researchers have known this for decades, but the reasons for this clustering are still unclear. To explore this question further, Jeanne Hardebeck of the U.S. Geological Survey took a closer look at the aftershock … Continue Reading »
22 April 2022–The 12 August 2021 South Sandwich Island earthquake had a surprise hidden within its complex rupture sequence: a slow, shallow magnitude 8.16 subevent that was “invisible” to researchers at first glance. At the Seismological Society of America’s Annual Meeting, Zhe Jia, a geophysics graduate student at CalTech, described … Continue Reading »