2010 Darfield, New Zealand, REHS

Ground motion information:

NGA Record Sequence Number 6959

Magnitude = 7
Closest Distance = 19.5 km
Hypocentral Distance = 49.54 km
Vs30 = 275 m/s
Mechanism = Strike slip

T_p = 12.02 s
PGV = 65.3 cm/s

Orientation of strongest pulse, relative to north = 342 degrees
Orientation of strongest pulse, relative to fault parallel = 77 degrees
Pulse in fault normal direction = 0
Pulse due to directivity = 1

Comments:

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

Directivity parameters:

X = 0.55
s = 29 km
θ = 7.1

Y = 0.46
d = 11 km
φ = 20.7

IDP = 3.22
Rowshandel parameter = 0.61