Toro, Abrahamson and Schneider Attenuation Relations (1997)

based on http://peer.berkeley.edu/~jrodgers with permission.

In this example, you can calculate peak ground acceleration and the psuedoacceleration spectrum at a site in eastern or central North America using attenuation relationships by Toro, Abrahamson, and Schneider, 1997. Note that the site-to-fault distance is closest horizontal distance to the vertical projection of the rupture and the relationship is valid over the range of 1 to 100 km only. The valid range of magnitudes is 5 < Mw < 8.

Ground Motion Chara. :             

Region:                                               

Site to fault distance (km):

Moment magnitude (Mw):


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

PGA (g)

-
Sa (g)