1989 Loma Prieta, Los Gatos

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 3548

Magnitude = 6.9
Closest Distance = 5 km
Hypocentral Distance = 26.83 km
Vs30 = 1070 m/s
Mechanism = Reverse-oblique

T_p = 1.57 s
PGV = 121.3 cm/s

Orientation of strongest pulse, relative to north = 49 degrees
Orientation of strongest pulse, relative to fault parallel = 79 degrees
Pulse in fault normal direction = 1
Pulse due to directivity = 1

Comments:

no comment

Directivity parameters:

X = 0.47
s = 18.6 km
θ = 23.9

Y = 0.81
d = 14.53 km
φ = 5.3

IDP = 2.88
Rowshandel parameter = 0.13

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