2011 Christchurch, New Zealand, SHLC

Ground motion information:

NGA Record Sequence Number 8130

Magnitude = 6.1
Closest Distance = 5.6 km
Hypocentral Distance = 9.98 km
Vs30 = 210 m/s
Mechanism = Reverse-oblique

T_p = 3.58 s
PGV = 72.4 cm/s

Orientation of strongest pulse, relative to north = 295 degrees
Orientation of strongest pulse, relative to fault parallel = 56 degrees
Pulse in fault normal direction = 0
Pulse due to directivity = 0

Comments:

Pulse is late. 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 = 0.15
s = 1.03 km
θ = 82.62

Y = 0.6
d = 5.97 km
φ = 29.83

IDP = Unknown
φ = Unknown