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Surveys High-Resolution Geophysical Technologies
ARM Geophysics provides Multi-Channel Analysis of Surface Waves (MASW) surveys for
many applications. MASW is a new seismic technique that can be used in many places
where conventional seismic refraction methods can not be used. Data collection typically
consists of a seismograph, geophones and a sledgehammer for a source. Rather than
analyzing the primary (P) wave as in refraction surveys the MASW method uses shear
wave or S waves that are generated in a surface seismic wave. MASW is typically
effective to a depth of approximately 30 meters.
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MASW Provides:
- Void Mapping
- Abandoned Mine Location
- Top of Bedrock
- Shear Wave Data
- Earthquake Design Data
- Bedrock Fracture Zones
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ARM has utilized MASW data to provide shear wave maps of the subsurface for earth
quake design site classification (Site class E, D, or C) per the 2003 International
Building Code. ARM has also utilized MASW to map voids, top of bedrock, and soft
or weaker bedrock zones. The figure below depicts a MASW profile showing top of
bedrock and areas of weaker or less competent bedrock. This information is important
in both geotechnical and environmental applications.
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