- Ground-motion model is:
where PGA is in g, a

_{1}= -3.93, a_{2}= 0.78, a_{3}= -1.5 and σ = 0.55. - All records from stiff bedrock. Shear-wave velocities estimated from geology gives: 1200–2000m∕s for carbonated formations and > 2500m∕s for eruptive formations (majority of data).
- Derive equation since find previous equations are not consistent with recent data recorded in France and
because of differences between M
_{L}of LDG and other M_{L}scales. - Use data from the Alps, the Pyrenees and Armorican Massif recorded by LDG network of vertical seismometers between 1995 and 1996. Convert vertical PGAs to horizontal PGAs using empirical relation of Smit (1998).
- Focal depths between 2 and 12km.
- 11 records from 3 ≤ d
_{e}≤ 50km, 34 from 50 < d_{e}≤ 200km and 18 from d_{e}> 200km (all from two largest earthquakes with M_{L}5.3 and M_{L}5.6). - Plot predictions and data from rock sites of all French earthquakes with M
_{L}≥ 4 recorded by RAP network (largest three earthquakes have M_{L}5.5, M_{L}5.7 and M_{L}5.9) and find good agreement. State that this agreement shows that equation can be extrapolated to strongest earthquakes considered for France. - Note that it will be possible to establish a more robust equation using increasing number of data from RAP, especially from near field and large magnitudes.