Attenuation relation from Iyengar and Raghukanth (2004)

In this example, you can calculate horizontal peak ground acceleration at a site in Peninsular India using attenuation relationships by Iyengar and Raghukanth (2004). Hypocentral Depth is taken as 10.0 Km and the relation is valid over the range of 10 to 300 km for rock sites only. The example is based on http://peer.berkeley.edu/~jrodgers

Ground motion parameter:

Epicentral distance (km):

Moment magnitude (Mw):


Parameter
Period (s)
Natural Log value
Estimated value
value + s

PGA (g)

-
PGV (cm/s)
-
Sa (g)

Example:

    Suppose your building is located somewhere in Mumbai city and there is a possibility of an earthquake of say Mw=6.0 along the existing fault located near Mumbai (eg. Thane-Panvel fault system).

    The program will help you to estimate the ground motion in terms of largest acceleration that can be generated at the base of your building assuming that your building is located on rocky strata. The horizontal acceleration calculated using this interactive example will be the acceleration that will move your building in horizontal direction causing vibrations in the building. If it exceed the permissible limit then the building may suffer damage.