USGS PCMSC

Surface Wave Investigation and Analysis Earthquake-Induced Liquefaction Sites in Asia

Index Back to home page About these web pages Example data set Phase 3 Phase 2 Phase 1 Project objectives Abstract Phase I

Field Testing by Spectral Analysis of Surface Waves (SASW), a Non-invasive Method for Shear Wave Profiling
Photo of sasw set-up at Wufeng, Taiwan. (84K)

Click on figures to view larger images.

 We use a computer controlled ground vibrator to the improve the low frequency energy of our source. All the sites we visited are documented in the literature, so that the stratigraphy is known and the sites have been tested by conventional penetration test procedures.

The available site information allows us to independently identify the critical layer that liquefied
Photo of earthquake damage at Kawagishi-Cho, Niigata City, Japan 1964.(52K) Photo of sasw testing in Kawagishi-Cho, Niigata City, Japan 2002.(40K)

geotech/saswposter/phase1.html
contact: Robert Kayen
last modified 2018