1981 Westmorland, Parachute Test Site

Plots of original ground motion, extracted pulse, and residual ground motion:

Map of epicenter, rupture extent and station location:

Ground motion information:

NGA Record Sequence Number 316

Magnitude = 5.9
Closest Distance = 16.7 km
Hypocentral Distance = 20.6 km
Vs30 = 349 m/s
Mechanism = Strike slip

T_p = 4.39 s
PGV = 60.8 cm/s

Orientation of strongest pulse, relative to north = 204 degrees
Orientation of strongest pulse, relative to fault parallel = 40 degrees
Pulse in fault normal direction = 1
Pulse due to directivity = 1

Comments:

no comment

Directivity parameters:

X = 0.6
s = 5.99 km
θ = 42.3

Y = 0.04
d = 0.3 km
φ = 80.5

IDP = 0.19
Rowshandel parameter = -0.03

Notes:

These results were computed November 1st, 2012
These results are based on the June 2012 version of the NGA West 2 database
If you have any observations, comments or requests regarding this data, please e-mail Jack Baker and Shrey Shahi

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