Acta Scientiarum Polonorum

Sending alerts or warnings about ground tremors is known as an earthquake early warning system (EEWS). It is issued after the earthquake has already started to cause observable ground motion, setting it apart from the forecast. The interval between detection and the moment a user feels ground motion is known as the available warning time. Therefore, the potential warning window can be anywhere between seconds and minutes. Similarly to this, users must be able to act quickly because only seconds to minutes are available to collect, interpret, and transmit seismological data and warning signals. By reviewing previously published, high-quality literature, the review article offers clear insight into EEWSs and how they operate. This will support researchers in understanding the current technologies used to send signals to save lives from earthquakes at the appropriate time. The effects of earthquakes and how they have been tracked using EEWSs are also covered in the article.