Path and Site Effects on Localized Damage Caused by
the 1994 Northridge Earthquake
This study utilizes the 98-station Northridge Earthquake Aftershock
Recording data set
to investigate site effects and the effects of underground
structure in order to understand the causes of the
enhanced damage in Sherman Oaks and mid-Santa Monica
caused by the January 17, 1994 Northridge earthquake.
The conclusion is that the traditional method for
seismic zonation, which is based on surface geology,
is inadequate to describe fully areas affected by strong path effects.
Focusing-defocusing is the most important path effect.