1999 Chi-Chi, Taiwan, TCU088

Ground motion information:

NGA Record Sequence Number 1520

Magnitude = 7.6
Closest Distance = 18.2 km
Hypocentral Distance = 58.18 km
Vs30 = 684 m/s
Mechanism = Reverse-oblique

T_p = 11.14 s
PGV = 35.5 cm/s

Orientation of strongest pulse, relative to north = 5 degrees
Orientation of strongest pulse, relative to fault parallel = 31 degrees
Pulse in fault normal direction = 0
Pulse due to directivity = 0

Comments:

Not really a directivity geometry. Pulse is preceeded by high-frequency motion.

Directivity parameters:

X = 0.62
s = 56.01 km
θ = 44.3

Y = 0.32
d = 11.81 km
φ = 50.6

IDP = 1.03
Rowshandel parameter = 0.01