Attenuation Relationship

Sadigh et al. (1997) Attenuation Relationship

This Attenuation Relationship was published by Sadigh et al. (1997, Seismological Research Letters, vol 68, num 1, pp 180-189).

Supported Intensity Measure Types (IMTs):

Peak Ground Acceleration (PGA)
Spectral Acceleration (SA) - 5% damped at the following periods: 0.0, 0.075, 0.1, 0.2, 0.3, 0.4, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, and 4.0.

Independent Parameters (used to compute exceedance probabilties):

Earthquake Rupture Related Parameters:

Magnitude
Fault Type (Reverse or Other)

Site Related Parameters:

Site Type (Rock/Shallow-Soil or Deep Soil)

Propagation-Effect Related Parameters:

DistanceRup

Other Parameters:

Component (Average Horizontal)
Standard Deviation Type (Total or Zero)
Sigma Truncation (and Sigma Truncation Level)

Model Details: see the publication referenced above.