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Poster Abstracts
found at other stations. Our objective is to extend the study to Salton Sea rift zone along the SAF using more recent data and
newly installed stations, and to examine topographic structure of the Moho and its variation across the fault. The purpose of
this study is to understand earthquakes by determining seismic properties of the lithosphere. If sharp topography can be
observed on the Moho, that will be evidence of lower crust having enough strength to hold vertical offsets. Our data shows 30
to 37 km depth Moho beneath the Eastern San Gabriel Mountains, and much shallower Moho depth of 14 to 20 km beneath
Salton Sea. Moho depth seems to vary as a function of azimuth, becoming less north to south. We are testing whether the
variation is due to offsets, dip or anisotropy.
References: Yan, Z., Clayton, R.W., 2007, A notch structure on the Moho beneath the Eastern San Gabriel Mountains: Earth and
Planetary Science Letters 260 (2007) 570-581
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