Attenuation Relationship

Campbell (1997) Attenuation Relationship

This Attenuation Relationship was published by Campbell (1997, Seismological Research Letters, vol 68, num 1, pp 154-179), as corrected in the Erratum (Campbell, 2000, Seismological Research Letters, vol 71, num 3, pp 352-354).

Supported Intensity Measure Types (IMTs):

Peak Ground Acceleration (PGA)
Peak Ground Velocity (PGV)
Spectral Acceleration (SA) - 5% damped at the following periods: 0.0, 0.05, 0.075, 0.1, 0.15, 0.2, 0.3, 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, Other, or Unknown)

Site Related Parameters:

Campbell Site Type (Firm Soil, Soft Soil, Hard Rock, Generic Rock, or Generic Soil)
Campbell Basin Depth (Depth (km) to Cretaceous, crystalline basement, or 3 km/sec S-wave velocity)

Propagation-Effect Related Parameters:

DistanceSeis

Other Parameters:

Component (Average Horizontal or Vertical)
Standard Deviation Type (Total (Mag Dependent), Total (PGA Dependent), or Zero)
Sigma Truncation (and Sigma Truncation Level)

Model Details: see the publications referenced above.