1989 Loma Prieta, Oakland - Outer Harbor Wharf

Ground motion information:

NGA Record Sequence Number 783

Magnitude = 6.9
Closest Distance = 74.3 km
Hypocentral Distance = 95.62 km
Vs30 = 249 m/s
Mechanism = Reverse-oblique

T_p = 1.83 s
PGV = 48.2 cm/s

Orientation of strongest pulse, relative to north = 37 degrees
Orientation of strongest pulse, relative to fault parallel = 89 degrees
Pulse in fault normal direction = 1
Pulse due to directivity = 0

Comments:

Soft soil site. Too far away to be directivity

Directivity parameters:

X = 0.5
s = 20.02 km
θ = 28.2

Y = 0.81
d = 14.53 km
φ = 48.5

IDP = 2.07
Rowshandel parameter = 0.12