1979 Coyote Lake, Gilroy Array #2

Ground motion information:

NGA Record Sequence Number 147

Magnitude = 5.7
Closest Distance = 9 km
Hypocentral Distance = 13.55 km
Vs30 = 271 m/s
Mechanism = Strike slip

T_p = 1.46 s
PGV = 32 cm/s

Orientation of strongest pulse, relative to north = 139 degrees
Orientation of strongest pulse, relative to fault parallel = 17 degrees
Pulse in fault normal direction = 0
Pulse due to directivity = 1

Comments:

Other array sites have the same pulse, including NGA #150 which is clear directivity. So, classified as directivity.

Directivity parameters:

X = 0.62
s = 4.1 km
θ = 56.4

Y = 0.71
d = 5 km
φ = 38.7

IDP = 0.5
Rowshandel parameter = 0.1