1.31 Campbell & Bozorgnia (2008)

 

1) Reference

 

Kenneth W. Campbell and Yousef Bozorgnia, 2008, NGA Ground Motion Model for the Geometric Mean Horizontal Component of PGA, PGV, PGD and 5% Damped Linear Elastic Response Spectra for Periods Ranging from 0.01 to 10 s, Earthquake Spectra, Volume 24, No. 1, pages 139–171.

 

2) Estimated physical parameter

 

- Peak ground acceleration (GMRotI50),

- Peak ground velocity (GMRotI50),

- Peak ground displacement (GMRotI50),

- Acceleration response spectra (h=5%, T=0.01sec to 10 sec) (GMRotI50),

where GMRotI50 (Boore et al., 2006): Orientation-independent geometric mean horizontal component

 

3) Used strong motion data

 

- Area: World wide

- Type of earthquake: Shallow crustal

- Period: 1952– 2003 years

- Number of events: 64

- Number of records: 1561

- Magnitude: 4.3 – 7.9

- rupture distance: 0.1 – 199 km

 

4) Style of faulting

 

(a)   Normal – Normal Oblique (30 deg. <rake < 150 deg.)

(b)   Reverse – Reverse Oblique (-150 deg. <rake < -30 deg.)

 

5) Ground condition

 

Represented by AVS30

 

6) Definition of magnitude

 

Moment magnitude

 

7) Definition of source distance

 

Rupture distance (Closest distance to the coseismic rupture plane)

J-B distance (Closest distance to the surface projection of the coseismic rupture plane)

 

8) Definition of horizontal component

 

Geometric mean of two perpendicular horizontal components

 

9) Applicability written in the paper

 

NGA model to be appropriate for estimating PGA, PGV, PGD and linear elastic response spectra (T=0.01–10 s) for shallow continental earthquakes occurring in western North America and other regimes of similar active tectonics

The model is considered most reliable when evaluated for

(1) M>4.0;

(2) M<8.5 for strike-slip faulting, M<8.0 for reverse faulting, and M<7.5 for normal faulting;

(3) RRUP=0–200 km;

(4) AVS30 =150–1500 m/ s or alternatively NEHRP site classes B, C, D and E;

(5) Z2.5 =0–10 km;

(6) ZTOR=0–15 km; and

(7) d=15–90°.

 

10) Empirical attenuation formula