2011 Christchurch, New Zealand, HPSC

Ground motion information:

NGA Record Sequence Number 8090

Magnitude = 6.1
Closest Distance = 4.4 km
Hypocentral Distance = 9.78 km
Vs30 = 210 m/s
Mechanism = Reverse-oblique

T_p = 6.85 s
PGV = 48.3 cm/s

Orientation of strongest pulse, relative to north = 291 degrees
Orientation of strongest pulse, relative to fault parallel = 52 degrees
Pulse in fault normal direction = 0
Pulse due to directivity = 0

Comments:

Soft soil or basin effect. Directivity effects were most clearly seen in the fault parallel orientation for this earthquake. See Bradley and Cubrinovski(2011) for more details about this earthquake.

Directivity parameters:

X = 0.56
s = 3.92 km
θ = 59.48

Y = 0.6
d = 5.97 km
φ = 24.95

IDP = Unknown
φ = Unknown