Glossary

Maximum value of the distribution of the intensity measures (e.g. PGA) of the rotated waveforms

Median value of the distribution of an intensity measures (e.g. PGA) of the rotated waveforms

The Sampling Interval (Time Step) corresponds to the time step between two consecutive points of the record

An ordered arrangement of seismometers

The magnitude of the component couple of the double couple that is the point force system equivalent to a fault slip in an isotropic elastic body. It is equal to rigidity times the fault slip integrated over the fault plane.

A seismic network indicates a set of recording instruments (short-period

The seismic sequence is a series of earthquakes which occur in the same region at close intervals of time.

The brittle tectonic element either causative of a particular seismic event/mainshock(s) of a given sequence or deemed potentially responsible for a future one.

To synchronize the record with respect to the Greenwich Meridian Time (GMT) the time of first sample of the record is given

In a late triggered record, the recording instrument triggered after the arrival of the first seismic waves of significant amplitude.

The type of fault is defined according to the orientation (strike), the sense of slip (rake) and the inclination (dip) of the fault plane.

The uncorrected record (also called raw record) is the signal coming from the recording instrument after the analog-digital conversion and transformed by calibration factors to the proper measurement units.

The V_s profile contains the information on the propagation velocity of shear (S) waves in the soil underneath or in the vicinity of an accelerometric station, as a function of depth.e vicinity of an accelerometric station.

The V_s,30 is a suitable average measure of the shear (S) waves propagation velocity in the soil, within the first 30 meters of depth from the ground level.

The waveform is the visual form of the recorded time history of wave motion.