1999 Chi-Chi, Taiwan, TCU015

Ground motion information:

NGA Record Sequence Number 1471

Magnitude = 7.6
Closest Distance = 49.8 km
Hypocentral Distance = 101.93 km
Vs30 = 431 m/s
Mechanism = Reverse-oblique

T_p = 9.11 s
PGV = 44 cm/s

Orientation of strongest pulse, relative to north = 68 degrees
Orientation of strongest pulse, relative to fault parallel = 31 degrees
Pulse in fault normal direction = 0
Pulse due to directivity = 0

Comments:

A little distant, lots more cycles after the pulse

Directivity parameters:

X = 0.62
s = 56.01 km
θ = 29.7

Y = 0.4
d = 14.8 km
φ = 8.7

IDP = 2.85
Rowshandel parameter = 0.32