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Seismic Method Services
15 services found
by:GeoView, Inc. based inSt. Petersburg, FLORIDA (USA)
All seismic methods measure the travel-time and frequency of elastic waves as they propagate through the subsurface. The methods commonly used in shallow geophysics involve using an impact source (hammer, weight drop, explosive source) to generate the seismic wave and recording the arrival of the waves with a seismograph and a ...
by:Environmental Compliance Associates, LLC (ECA) based inKennewick, WASHINGTON (USA)
ECA Geophysics performs geophysical surveys that accomplish several objectives that include 1) determining depth to bedrock (electrical and seismic methods), 2) establishing IBC Site Class via Refraction Microtremor - ReMi (seismic method), 3) locating buried metallic debris and drums (magnetic method), 4) ...
by:ECA Geophysics based inKennewick, WASHINGTON (USA)
ECA Geophysics performs geophysical surveys that accomplish several objectives that include 1) determining depth to bedrock (electrical and seismic methods), 2) establishing IBC Site Class via Refraction Microtremor - ReMi (seismic method), 3) locating buried metallic debris and drums (magnetic method), 4) ...
by:Ninyo & Moore based inSan Diego, CALIFORNIA (USA)
This method is a variation of the seismic refraction method employing a downhole tri-axial geophone and a surface energy source or a downhole source. The energy propagates from the source to the downhole tri-axial geophone and can be recorded as compression and/or shear waves. This method provides detailed layer velocity ...
by:Spotlight Geophysical Services based inDoral, FLORIDA (USA)
Marine seismic refraction is a method to determine the seismic P-wave velocity structure of the subsurface. The P-wave velocity is related to the hardness of the sub-bottom materials and can be used to map the top-of-rock, determine the dredgeability of sub-bottom materials, and identify anomalous conditions. Seismic P-waves are ...
by:Zonge International based inTucson, ARIZONA (USA)
Seismic, gravity and magnetotelluric methods combine to answer key economic questions for geothermal resource development. ...
by:Landtech Geophysics Ltd based inCardiff, UNITED KINGDOM
The realization that Magnetotellurics (MT) data can provide complementary information to that derived from seismic exploration. For example, the diffusive signal propagation used in MT can be an advantage in a region of intense fracturing. While seismic signals will be scattered, the MT signals diffuse and give a reliable estimate of bulk properties such as porosity. Just as in seismic ...
by:Geotec Engineering & Environmental Geophysics Ltd based inrishon letzion, ISRAEL
A seismic survey is based on an energy source that excites seismic (elastic) waves in the subsurface. The seismic waves propagate in the subsurface and are reflected or refracted in the interfaces between mediums, having a different seismic velocity. The reflected and refracted waves are recorded on the surface by an array of receivers (geophones). The recorded travel times between the source and ...
by:Park Seismic LLC based inShelton, CONNECTICUT (USA)
Active surveys are performed by using an actively controlled seismic source such as a sledgehammer and an acquisition system consisting of a linear receiver array usually of 24-channels (or more). This type of survey is the most common and can usually achieve an investigation depth of 100 ft or less. Results can be 1-D, 2-D, or 3-D maps showing subsurface distribution of ground stiffness ...
by:Landtech Geophysics Ltd based inCardiff, UNITED KINGDOM
Drilling is the traditional and still the most common method used in coal exploration. Most coal companies rely heavily on borehole data to evaluate their mine properties. However for the Underground Coal Gasification (UCG) and Coal Bed Methane (CBM) it is necessary to map the subsurface coal and to detect other spatial properties of the coal seam with a high degree of accuracy. Here the ...
by:Geotechnology, Inc. based inSt. Louis, MISSOURI (USA)
Geophysical surveying is a useful and cost-effective solution for investigating and characterizing subsurface conditions non-destructively. We have extensive knowledge and experience in the application of a comprehensive range of geophysical methods for environmental, geotechnical, hydrogeological and engineering projects. The methods and technology we use, like Ground Penetrating Radar (GPR), ...
Manufactured by:Silixa Ltd based inElstree, UNITED KINGDOM
The intelligent Distributed Acoustic Sensor (iDAS), when coupled to an optical fibre, provides a versatile seismic acquisition platform capable of meeting many borehole seismic ...
by:Fugro based inLeidschendam, NETHERLANDS
Fugro enables you to manage your project risks by providing you with state-of-the-art data acquisition, consulting services, geologic hazards risk assessment and mitigation. In regions of the world with geotechnical, environmental and climatic complexities we deliver a professional service by combining our in-house geologic and geophysical surveying capabilities with our experienced ...
by:GeoView, Inc. based inSt. Petersburg, FLORIDA (USA)
Geophysics should be an integral part of any geotechnical site characterization study. GeoView has performed thousands of geophysical surveys as part of geotechnical characterization studies. The projects are managed by licensed professional geologists who have the tools and the knowledge to bring the appropriate method to each job. The following are common applications of geophysics in these ...
by:Spotlight Geophysical Services based inDoral, FLORIDA (USA)
Seismic refraction is a geophysical method used to determine the seismic compression-wave (P-wave) velocity structure of the subsurface. Seismic P-waves are generated on the surface, propagate through the soil and rock, and are recorded by geophones at known distances from the source. Since P-waves are the fastest portion of the ...