2011 Christchurch, New Zealand, LPCC

Ground motion information:

NGA Record Sequence Number 8158

Magnitude = 6.1
Closest Distance = 6.1 km
Hypocentral Distance = 7.3 km
Vs30 = 660 m/s
Mechanism = Reverse-oblique

T_p = 3.8 s
PGV = 44.7 cm/s

Orientation of strongest pulse, relative to north = 19 degrees
Orientation of strongest pulse, relative to fault parallel = 40 degrees
Pulse in fault normal direction = 0
Pulse due to directivity = 0

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 = 0.09
s = 0.65 km
θ = 80.99

Y = 0.39
d = 3.92 km
φ = 57.35

IDP = Unknown
φ = Unknown