2004 Parkfield-02, CA, Parkfield

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 4101

Magnitude = 6
Closest Distance = 5.6 km
Hypocentral Distance = 14.37 km
Vs30 = 397 m/s
Mechanism = Strike slip

T_p = 0.52 s
PGV = 31 cm/s

Orientation of strongest pulse, relative to north = 66 degrees
Orientation of strongest pulse, relative to fault parallel = 75 degrees
Pulse in fault normal direction = 1
Pulse due to directivity = 1

Comments:

no comment

Directivity parameters:

X = 0.25
s = 10 km
θ = 24.9

Y = 0.7
d = 5.6 km
φ = 30.7

IDP = 1.21
Rowshandel parameter = -0.55

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