2010 Darfield, New Zealand, CBGS

Ground motion information:

NGA Record Sequence Number 6887

Magnitude = 7
Closest Distance = 18.1 km
Hypocentral Distance = 48.2 km
Vs30 = 275 m/s
Mechanism = Strike slip

T_p = 12.62 s
PGV = 59.9 cm/s

Orientation of strongest pulse, relative to north = 346 degrees
Orientation of strongest pulse, relative to fault parallel = 81 degrees
Pulse in fault normal direction = 1
Pulse due to directivity = 1

Comments:

See Bradley (2012) for more details about this earthquake.

Directivity parameters:

X = 0.55
s = 29 km
θ = 6.4

Y = 0.46
d = 11 km
φ = 17.8

IDP = 3.23
Rowshandel parameter = 0.61