1999 Chi-Chi, Taiwan-03, TCU078

Ground motion information:

NGA Record Sequence Number 2628

Magnitude = 6.2
Closest Distance = 7.6 km
Hypocentral Distance = 7.82 km
Vs30 = 443 m/s
Mechanism = Reverse-oblique

T_p = 3.86 s
PGV = 56.3 cm/s

Orientation of strongest pulse, relative to north = 280 degrees
Orientation of strongest pulse, relative to fault parallel = 80 degrees
Pulse in fault normal direction = 0
Pulse due to directivity = 0

Comments:

Not directivity geometry. Right over the hypocenter, with the rupture propagating away.

Directivity parameters:

X = 0.03
s = 0.26 km
θ = 64.1

Y = 0.16
d = 1.81 km
φ = 76.6

IDP = 0.07
Rowshandel parameter = -0.2