The retrieved literature consistently supports the utility of prompt gravity and elastogravity signals (PEGS) for earthquake early warning. Papers [9], [10], and [11] explicitly address how these speed-of-light gravity changes can be detected before seismic waves arrive, enabling faster and more accurate real-time magnitude estimation and tracking for large earthquakes and tsunamis. Other papers ([1], [4], [5], [6], [7], [8]) discuss postseismic or coseismic gravity changes measured by satellites, which further validate the physical basis of earthquake-induced gravity signals, though the direct operational early warning utility is most explicitly stated in papers [9], [10], and [11].