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Shallow seismic surveying equipment being used by staff geologists. Click the image to enlarge and for more information.
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As part of its ongoing mission to map the state’s glacial and surficial geologic materials, the Ohio Geological Survey utilizes various methods to collect and analyze data. Since June 2002, the Survey periodically has turned to the use of portable seismic surveying equipment, which provides a rapid and inexpensive means of determining the depth to bedrock and characterizing the stratigraphy and physical properties of surficial materials as opposed to drilling boreholes. The equipment can be used in a wide range of situations and requires no dedicated vehicle.
The listed reports contain analyses, documents, and data from seismic refraction and multichannel analysis of surface waves (MASW) investigations performed in the state of Ohio by the Ohio Geological Survey. These investigations measure compressional-wave (P-wave) and/or shear-wave (S-wave) velocities to produce models that characterize the subsurface geology of the buried bedrock surface and overlying sediments, including nature and thickness of the materials. The collected S-wave data were also used to determine the in situ elastic and seismic properties of soils and bedrock. This information also is useful to geotechnical engineers and seismic specialists and can be used to map karst features and voids.
The index map below identifies those counties for which seismic investigations have been done, followed by a listing of available linked reports for each of those counties sorted by township.
Reports Currently Available for Download
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Ashtabula County
Delaware County
Erie County
Fairfield County
Fayette County
Franklin County
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Fulton County
Geauga County
Highland County
Hocking County
Knox County
Madison County
Ottawa County
Ross County
Wood County
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