Now devices can gauge a number of things, such as the location and speed of quakes, and the sway of the building. Some measure only small, imperceptible tremors, while others are designed for major quakes.
除了專測地震發生地點的地震儀，還有專司地震速度的「速度型感應器」、測大樓擺動情形的強震儀、只能感受近距離的短周期地震儀、只感應無感地震或大地震的地震儀… …。