Figure 5. - Distribution of slip on the Northridge fault
plane. Contours and shading indicate the slip amplitude (in
meters), and arrows indicate the slip vector for each
subfault of the model. The model has 10 subfaults along-
strike and 13 down-dip, each 2 km by 2 km. Slip evidently
occurred mainly updip and northwest of the hypocenter. Less
than one meter of slip occurred above a depth of 5 km. This
model, based solely on the GPS data, differs substantially
from those based solely on seismological data (Wald and
Heaton, 1994b; Dreger, in press). It differs, but less
dramatically, with the "geodetic only" and "combined" models
of Wald et al. (this issue).
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