Communication, Education and Outreach (CEO)
	Javier Santillan, 1998

Intern	Institution	Mentor	Project Title
Javier Santillan	UC Santa Barbara	Jaime Steidl	Understanding Ground Motion Variations at the Van Norman Dam Complex Site

Abstract

During the 1994 Northridge event, seismic stations at the Van Norman Dam Complex recorded peak accelerations that significantly varied over short distances. In an effort to gain further understanding of this behavior, this project focused on comparing weak ground motion at six different sites around the dam. The first station was an existing SCEC borehole at the Jensen Generator Building. The other stations were placed at the Jensen Administration Lawn, Sylmar Converter Station West and East, the Los Angeles Dam, and the Rinaldi Station. Over the course of two months, a few weak motion events yielded enough data to begin a comparison of the array stations to data recorded at the borehole station during the previous seven months. The weak motion data recorded during this project have shown ground motion variation similar to those observed during the Northridge earthquake.

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