Earthquake early warning (EEW) systems aim to provide advance warning of impending ground shaking. and the technique used for real-time prediction of shaking is a crucial element of EEW systems. Many EEW systems are designed to predict the strength of seismic ground motions (peak ground acceleration. peak ground velocity. https://www.roneverhart.com/AliMed-Elbow-Positioning-Wedge-Elbow-Positioning-Wedge-90-Degrees-Left-80791/