Early warning systems like the RTD deliver earthquake data tens of seconds to minutes after a quake strikes. This data includes the quake's magnitude and epicenter, as well as the distribution of seismic waves over a given area (so-called "shake maps"). The systems can even indicate how badly critical infrastructure has been shaken.
所謂的地震速報系統，指的是在地震發生後數十秒至數分鐘內，提出震央、規模、各地震度分佈圖，甚至重要公共設施搖晃情形等各種資訊。