Advancing earthquake science worldwide
22 May 2023–Simona Gabrielli studies seismic attenuation, or what happens when a seismic wave interacts with its surrounding medium. She compares it to how a stone dropped into a pond sends ripples through the water, and the ripples change direction depending on what they meet as they move across the … Continue Reading »
Leer en Español 20 April 2023–Tsunami deposits identified in a coastal mangrove pond in Northwest Puerto Rico could have come from a megathrust earthquake at the Puerto Rico Trench that occurred between 1470 and 1530, according to research reported at the Seismological Society of America (SSA)’s 2023 Annual Meeting. These … Continue Reading »
20 April 2023–Staff in public and private hospitals in Mexico City are likely to follow well-established and reinforced earthquake early warning (EEW) protocols for evacuation, according to an ongoing study. Overall, staff are likely to follow the protocols especially when they are “reinforced with drills that help practice the correct … Continue Reading »
20 April 2023–South Korea is a relatively quiet country, seismically speaking, but a recent study identified more than 182,000 small seismic events–135,000 of which were related to mining explosions, according to a presentation at the Seismological Society of America (SSA)’s 2023 Annual Meeting. After using machine learning techniques to detect … Continue Reading »
20 April 2023–Faults in the Ridgecrest, California area were very sensitive to solid earth tidal stresses in the year and a half before the July 2019 Ridgecrest earthquake sequence, researchers reported at the Seismological Society of America (SSA)’s 2023 Annual Meeting. “The signal of tidal modulation becomes extremely strong” after … Continue Reading »
20 April 2023–A decade’s worth of research at oil and gas operations in the central and eastern United States has confirmed that fluid injection from hydraulic fracturing and wastewater disposal can induce seismicity. Now, data from hydraulic fracturing wells in eastern Ohio indicate that extraction activities also can influence the … Continue Reading »