Bulletin of the Seismological Society of America; February 2006; v. 96; no. 1;
p. 133-146; DOI: 10.1785/0120030243
© Seismological Society of America
Click on image to view larger version.

Figure 7. (top) Maps of maximum peak velocities in the Tiber River valley for the
M 5.3 Alban Hills scenario, superimposed with the 50-m-depth contours
for the isosurface of Vs = 250 m/sec. The peak
velocities are scaled by the same constant for all components. The triangles
indicate the location of Prati (Pra), Colosseum (Col), and Vatican City (Vat).
The dashed line depicts the profile used to display synthetic seismograms
(bottom).