2010 Darfield, New Zealand, NNBS

Ground motion information:

NGA Record Sequence Number 6942

Magnitude = 7
Closest Distance = 26.8 km
Hypocentral Distance = 56.57 km
Vs30 = 275 m/s
Mechanism = Strike slip

T_p = 8.04 s
PGV = 56.5 cm/s

Orientation of strongest pulse, relative to north = 154 degrees
Orientation of strongest pulse, relative to fault parallel = 69 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 = 8.5

Y = 0.46
d = 11 km
φ = 29.3

IDP = 3.2
Rowshandel parameter = 0.61