Seismic shadow zones have taught us much about the inside of the earth. This shows how P waves travel through solids and liquids, but S waves are stopped by the liquid outer core. https://youtu.be/7eeqzRUg4DU | EarthScope Consortium

Yellowstone Eruption Update | October 2025 Scientists reanalyzed seismic records and found 86,000 micro-earthquakes beneath Yellowstone that earlier methods missed. Microquakes help map where fluids and hot rock move and why the caldera remains active. Ground motion and swarms can shift over time, which is why monitoring combines seismic data, GPS uplift, gas, and temperature. This does not mean an eruption is imminent, but it is a reminder that Yellowstone is alive and under constant watch. In

1.5K views · 21 reactions | El 14th International Workshop on Seismic Microzoning and Risk Reduction reunió a especialistas de todo el mundo para compartir avances en microzonificación sísmica, evaluación de riesgo y gestión ante desastres. Un encuentro internacional donde la ciencia se une para fortalecer la resiliencia ante los sismos. #InstitutoDeIngenieríaUNAM #IWSMRR2025 #EarthquakeEngineering #CienciaUNAM #ResilienciaSísmica | Instituto de Ingeniería UNAM - iiunam | Facebook

75K views · 330 reactions | With seismic tomography, scientists map...

41 reactions · 30 shares | Seismic Shadow Zones—Introduction to P & S...

⚠️ The Deep Chamber Under LA That Can Supercharge the Next Quake ⚠️ A new seismic study has revealed a massive underground drop beneath Los Angeles, reaching almost ten kilometers. This deep chamber can bend and concentrate earthquake energy and drive shaking to far more dangerous levels than surface maps suggest. The mantle boundary is rising close to the surface and the crust beneath the city is severely thinned. Together these features create conditions for stronger and longer shaking during