SEA (Spudich et al., 1999) Attenuation Relationship

This Attenuation Relationship was published by Spudich, P., W.B. Joyner, A.G. Lindh, D.M. Boore, B.M. Margaris, and J.B. Fletcher (1999, "SEA99: A revised ground motion prediction relation for use in Extensional tectonic regimes," Bull. Seism. Soc. Am., vol 89, pp 1156-1170).

Supported Intensity Measure Types (IMTs):

• Peak Ground Acceleration (PGA)
• Spectral Acceleration (SA) - 5% damped at the following periods: 0.0, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.22, 0.24, 0.26, 0.28, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4, 0.42, 0.44, 0.46, 0.48, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, and 2.0.

Model Details: see the publication referenced above.