2010 Darfield, New Zealand, SMTC

Ground motion information:

NGA Record Sequence Number 6969

Magnitude = 7
Closest Distance = 20.9 km
Hypocentral Distance = 49.64 km
Vs30 = 270 m/s
Mechanism = Strike slip

T_p = 9.35 s
PGV = 64.4 cm/s

Orientation of strongest pulse, relative to north = 334 degrees
Orientation of strongest pulse, relative to fault parallel = 68 degrees
Pulse in fault normal direction = 1
Pulse due to directivity = 1

Comments:

Initial directivity pulse followed by site effects later in the time series. See Bradley (2012) for more details about this earthquake.

Directivity parameters:

X = 0.55
s = 29 km
θ = 14.7

Y = 0.46
d = 11 km
φ = 40.7

IDP = 2.96
Rowshandel parameter = 0.61