www.iris.edu/earthquake
ShakeAlert® ([ Ссылка ]) is an earthquake early warning (EEW) system that detects significant earthquakes so quickly that alerts can reach many people before shaking arrives. ShakeAlert is not earthquake prediction, rather a ShakeAlert message indicates that an earthquake has begun and shaking is imminent.
To download a copy of the mp4 and related short gifs, see the EarthScope / SAGE InClass page: [ Ссылка ]
