bssa_2014_nga: The GMPE of BSSA 2014 and updated versions with corrected CA...

In wltcwpf/GMPE: A pacakge of commonly used Ground Motion Prediction Equations (GMPE)

The GMPE of BSSA 2014 and updated versions with corrected CA subregional anelastic attenuation and basin effects

Description

This function calculates the ground motion median values and standard deviations

Usage

bssa_2014_nga(
  M,
  T = 1000,
  Rjb,
  Fault_Type,
  region,
  z1 = 999,
  Vs30,
  return.type = 1,
  CA_subreg_path = FALSE,
  site_lon = NULL,
  site_lat = NULL,
  clst_lon = NULL,
  clst_lat = NULL
)

Arguments

M	Moment magnitude, a numeric value
T	Period (sec); Use Period = -1 for PGV computation. Use 1000 (by default) for output the array of Sa with original NGA West2 periods
Rjb	Joyner-Boore distance (km); closest distance (km) to surface projection of rupture plane
Fault_Type	The indicator of fault type: 0 for unspecified fault; 1 for strike-slip fault; 2 for normal fault; 3 for reverse fault
region	Region indicator: 0 for global (incl. Taiwan); 1 for California; 2 for Japan; 3 for China or Turkey; 4 for Italy
z1	Basin depth (km): depth from the groundsurface to the 1km/s shear-wave horizon. 999 if unknown.
Vs30	Shear wave velocity averaged over top 30 m (in m/s)
return.type	The indicator specifies which type of data return: 1 for the med (in g)/sigma/phi/tau/period; 2 for F_E/F_P/F_P_GS(geomteric spreading)/F_P_AA(anelastic attenuation)/F_S; 3 for r/Ln_Flin/Ln_Fnlin/f2/F_dz1/PGAr
CA_subreg_path	The flag indicating if a CA subregional anelastic attenuation model (Buckreis et al., 2023) is applied. Buckreis, Stewart, Brandenberg, and Wang (2023) "Subregional Anelastic Attenuation Model for California".
site_lon	The longitude of site (in WGS84 degree). Required if CA_subreg_path is TRUE.
site_lat	The latitude of site (in WGS84 degree). Required if CA_subreg_path is TRUE.
clst_lon	Longitude (in WGS84 degrees) of closest point on the surface projection of the rupture surface to the site. Required if CA_subreg_path is TRUE.
clst_lat	Latitude (in WGS84 degrees) of closest point on the surface projection of the rupture surface to the site. Required if CA_subreg_path is TRUE.

Value

See return.type for the returned results

References

Boore, D. M., Stewart, J. P., Seyhan, E., and Atkinson, G. M. (2014). NGA-West2 Equations for Predicting PGA, PGV, and 5 Shallow Crustal Earthquakes. Earthquake Spectra, 30(3), 1057-1085.

Examples

bssa_2014_nga(M = 5, T = 1000, Rjb = 85, Fault_Type = 1, region = 1, z1 = 999, Vs30 = 350)
bssa_2014_nga(M = 5, T = 1000, Rjb = 85, Fault_Type = 1, region = 1, z1 = 999, Vs30 = 350, CA_subreg_path = TRUE, site_lon = -118.8713, site_lat = 35.80407, clst_lon = -116.9274, clst_lat = 33.6204)

wltcwpf/GMPE documentation built on July 27, 2024, 4:28 p.m.