Shallow Marine MASW: A Case History
ASCE GeoFlorida Conference proceedings, 2010.
JB Shawver, Zonge Geosciences, Inc., Minneapolis, Minnesota, U.S.A.
Alex Fisher, FMG Engineering, Rapid City, South Dakota, U.S.A.
Choon Park, Park Seismic LLC, Shelton, Connecticut, U.S.A.
Paper – [pdf] 2009 Sageep MASW offest method- Park Shawver
Paper – [pdf] 2010 GeoFlorida -Shawver-Fisher-Park2_shallow marine MASW
Seismic surface wave techniques were employed in a shallow marine environment to map depth to bedrock between available boreholes. Hydro-phone streamers with 1m and 3m receiver spacing were used as receiver arrays. MASW and micro-
A traditional means of collecting 2D MASW data utilizes a “walkaway” test to determine a single optimal source-receiver offset per survey profile. We show that multiple source-receiver offsets, and receiver-receiver spacings, were necessary to generate complete surface wave dispersion curves suitable for modeling total depth of investigation. We present challenges observed during the data collection, modeling of the data, and interpretation caused by using this traditionally land-based method in a marine environment.