Glossary

Instrument to measure seismic acceleration

An active fault is a fault that has slipped during the present seismotectonic regime and is therefore likely to have renewed displacement in the future.

A ground-motion parameter derived from an accelerogram and proportional to the integral of the acceleration squared over the entire signal duration.

An event or process detected by geological/geophysical tools and analyses that is apparently not accompanied by earthquake activity.

In general a direction measured clock-wise in degrees against the North.