2011 Christchurch, New Zealand, PRPC

Ground motion information:

NGA Record Sequence Number 8119

Magnitude = 6.1
Closest Distance = 2 km
Hypocentral Distance = 7.74 km
Vs30 = 275 m/s
Mechanism = Reverse-oblique

T_p = 4.82 s
PGV = 123.1 cm/s

Orientation of strongest pulse, relative to north = 135 degrees
Orientation of strongest pulse, relative to fault parallel = 76 degrees
Pulse in fault normal direction = 1
Pulse due to directivity = 1

Comments:

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 = 0.35
s = 2.43 km
θ = 60.23

Y = 0.6
d = 5.97 km
φ = 12.32

IDP = Unknown
φ = Unknown