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» AOA Geophysics Inc. 
Survey design, data acquisition and processing, mapping and interpretation, geoscience consulting as applied to energy exploration and development engineering, and geotechnical and construction engineering projects.
http://www.aoageophysics.com/
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» Abitibi Geophysics
Based in Quebec, offering a wide range of ground geophysical survey types for mineral exploration, particularly precious metals and diamonds.
http://www.ageophysics.com/
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» Actidyn Systemes
Form offering simulation of physical phenomena using vibration, universal testing machines, balancing machines, centrifuges and earthquake simulators.
http://www.actidyn.com/
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» Aeroquest International Limited
Providing services to the mining and oil and gas industries, offers both frequency-domain and time-domain helicopter electromagnetic systems as well as conventional fixed wing Mag/Grav and radiometric surveys.
http://www.aeroquestsurveys.com/english/index.php
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» Applied Geophysical Services
Velocity modeling and prestack depth migration using proprietary algorithms for seismic data processing.
http://www.appliedgeo.com/
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» Arcis
Seismic data processing, participation surveys, geotechnical services, marketing and data management, and 2D and 3D seismic data libraries for the Western Canadian Sedimentary Basin.
http://www.arciscorp.com/
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» Atlantic Subsurface Imaging
Uses ground penetrating radar (GPR) to locate utilities and other structures hidden in concrete or buried underground.
http://atlanticsubsurfaceimaging.com
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» Austin Exploration Inc.
Acquisition of marine and land gravity and magnetics surveys. Includes a description of non-exclusive surveys available, new technology systems, and data services.
http://www.austinex.com/
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» Australian Seismic Brokers
Maintains and licenses a seismic database library for the Asia Pacific region. Also has current spec data acquisition projects and reprocessing capabilities.
http://www.asb.com.au/
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» BGP, Inc.
Acquisition and processing of shallow water and transition zone seismic surveys.
http://www.bgp.com.cn/
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» Bird Seismic Services
Acquisition of streamer and transition zone seismic reflection and refraction for environmental, ground water surveys and shallow gas.
http://www.birdseismic.com/
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» Blackhawk
Geophysical imaging and emerging technologies to address a variety of applications and engineering problems related to transportation, infrastructure, environmental, mining, tunneling, unexploded ordnance, and oil and gas exploration.
http://www.blackhawkgeo.com/
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» Canesis Data
Offers data conditioning and restoration services, including seismic vectorizing and log and map digitizing.
http://www.canesis.net/
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» Carson Aerogravity
High resolution aerogravity and magnetic surveying. Turnkey survey data processing and interpretation. Includes a description of acquisition methods and equipment.
http://www.aerogravity.com/
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» Challenger Geophysical Ltd
Provides engineering and environmental geophysical data acquisition, processing and interpretation.
http://challenger-geophysical.com
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» Crone Geophysics and Exploration Ltd.
Time domain electromagnetics equipment design and survey acquisition. Includes case histories and technical papers.
http://www.cronegeophysics.com/
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» DMNG Sakhalin Geophysical Company
Research vessels for the acquisition of geophysical data, including gravitational prospecting, magnetometric prospecting and seismic survey 2D/3D.
http://www.dmng.ru/
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» Earthquake Detector
The Quake Alarm provides early warning of earthquakes by detecting the compression wave (the P wave) which precedes the actual shear wave of an earthquake.
http://www.quakealarm.com/
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» Electro-Seise, LP
Airborne micro-gravity surveys using a tuned frequency measurement, deriving the residual gravity anomalies, with proprietary spatial filtering and data collection techniques.
http://www.electro-seise.com/
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» ElectroMagnetic GeoServices
Uses seabed-logging, an application of marine controlled source electromagnetic (CSEM) that has the ability to map the subsurface resistivity remotely from the seafloor.
http://www.emgs.no/
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» Elliott Geophysics International
Manufactures a specialized line of geophysical equipment for airborne geophysical surveys, and provides project management and consulting for survey acquisition and processing.
http://www.geofisik.com/
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» Engineering Seismology Group Canada
Specializes in passive monitoring of induced microseismicity, designs and manufactures vibration sensors, acquisition systems and recording instruments.
http://www.esg-solutions.com/
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» Enviro-Tech Surveys Ltd.
Designs and executes 2-D and 3-D seismic surveys using state-of-the-art GPS technologies for digital mapping products.
http://www.etsurvey.com/
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» Excel Geophysics Inc.
Provies gravity and magnetics field surveys, data processing, interpretation and equipment rentals.
http://www.excelgeophysics.com/
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» Flamingo Seismic Solutions
Offers interpretive processing that provides detailed reservoir characterization using advanced AVO, spectral decomposition and seismic texture analysis.
http://www.flamingoseismic.com/
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» Force Balanced Physics
Details of a new earth in-situ mechanical systems relationship between mass, 3-D loads and stresses, pore fluid pressure, strain and rock physical properties. Also includes information on text book and services offered.
http://www.force-balanced.net/
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» GEDCO
Services in 3D and 2D seismic design, processing and interpretation as well as potential field services, such as high resolution aeromagnetic and gravity.
http://www.gedco.com/
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» GPR Professional Services
Offers ground penetrating radar services, including scanning, consulting, on-site training, and sales of GPR equipment. Based in Marblehead, Massachusetts.
http://www.gprps.com
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» Gardline Marine Sciences
2D/3D high resolution data acquisition and interpretation, shallow gas hazard analysis, seabed mapping, shallow to deep water soil investigation, near shore and coastal surveys and hydrometrics activities.
http://www.gardline.co.uk/marine_sciences.asp
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» GeoPen
Series of geophysical exploration instruments used for environmental and engineering exploration.
http://members.fortunecity.com/geopen_canada/
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» GeoStrata Resources Inc.
Operates geophysical acquisition crews capable of recording dynamite, vibroseis, truck or heliportable operations with both 3D or 2D parameters.
http://www.geostrata.ca/
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» Geodatos
Services in geophysical exploration covering the acquisition, processing and interpretation stages for the minerals, water resources and petroleum industries in Chile and South America.
http://www.geodatos.cl/web/english/index.html
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» Geoenergy
Providing solutions for seismic data compression, processing, and data management in the oil and gas industry.
http://www.geoenergycorp.com/
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» Geofizyka ToruĊ
3D and multicomponent seismic surveys in Eastern Europe. Onshore acquisition, processing and interpretation services, well logging and downhole seismic surveys.
http://www.geofizyka.torun.pl/
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» Geophex
Ground survey company conducting gravity, magnetic, electrical, electromagnetic, seismic reflection and refraction, and ground-probing radar surveys with a focus on environmental projects.
http://www.geophex.com/
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» Geophysical Development Corporation
Seismic data processing and exploration services including time and depth imaging, AVO and petrophysical analysis.
http://www.geodev.com/
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» Geophysical Service Incorporated
Crew operations, data management, equipment leasing, acquisition and processing of speculative land and marine 2D and 3D data.
http://www.geophysicalservice.com/
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» Geophysics GPR International
Airborne geophysics for mineral exploration, buried object detection, concrete structure evaluation, and environmental and contamination studies.
http://www.geophysiquegpr.com/
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» Geoseismic
Supplier of earthquake monitoring systems: Hardware and Software designed to track earthquakes.
http://www.geoseismic.com/
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» Geosystem
Controlled-source electromagnetic and magnetotelluric (MT) data acquisition, processing and interpretation, 2D/3D prestack time and depth imaging.
http://www.geosystem.net/
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» Global Geophysical Services
Specializes in acquiring high density, reservoir grade 3D data sets and provides land and marine seismic acquisition solutions on a proprietary contract or speculative basis.
http://www.globalgeophysical.com/
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» Hardin International Processing, Inc.
Geophysical processing center for seismic data. Includes a description of software and hardware technology and a company profile.
http://www.hardinintl.com/
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» Information Services
Publisher of the Oil and Gas Directory and the Geophysical Directory. Includes a description of content, sample pages, and ordering information.
http://www.informationservices.com/
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» JEBCO Seismic L.P.
Provides a library of spec data and non-exclusive surveys, including land 3D, transition zone, ocean bottom cable, and regional 2D and 3D marine programmes.
http://www.jebcoseis.com/
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» Kelman Technologies Inc.
Digital seismic data processing, archiving and data management services.
http://www.kelman.com/
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» Land Tech
Geophysical services and rental of geophysical equipment. Specializes in passive seismic tomography surveys for the oil industry and in pipeline early warning pollution systems.
http://www.landtech.org/
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» Lisle Gravity Inc.
Data broker offering sales and licensing of spec and proprietary gravity, aeromagnetic, and magnetotelluric surveys throughout the US. Includes an interactive map showing coverage.
http://www.gravitydata.com/
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» Mammoth Geophysical, Inc.
Remote sensing services using radiometric, geochemical, and Earth resistivity profiling surveys. Includes technical explanations and success stories.
http://www.mammoth-geo.com/
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» Mcphar Geosurveys Ltd
Provider of airborne geophysical surveys and measurements of gravity, magnetic and electromagnetic forces and gamma radiation on the ground and from fixed-wing aircraft and helicopters.
http://www.mgssurveys.com/
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» Multiwave Geophysical Company
Provider of marine seismic services to the global oil and gas industry with a focus on towed seismic, multiclient seismic services, and ocean bottom seismic as well as other geophysical sub-sea operations.
http://www.multiwave.no/
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» Naeva Geophysics, Inc
Subsurface detection using magnetics, electromagnetics, ground penetrating radar, UXO detection, seismic refraction and reflection, utility location, self potential, resistivity, and borehole logging.
http://www.naevageophysics.com/
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» New England Geophysical
Offers non-invasive subsurface investigations using ground penetrating radar, electromagnetic and radiological methods.
http://www.newenglandgeophysical.com/
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» New England Research
Scientists and engineers pursuing the understanding and applications of rock properties to geological problems.
http://www.ner.com/
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» New-Sense Geophysics Limited
Offering magnetic, radiometric and time domain electromagnetic airborne surveys to the mining and petroleum industries.
http://www.new-sense.com/
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» OYO Corporation.
Installation and maintenance of accelerographs and earthquake monitoring equipment, and consulting services on earthquake damage mitigation.
http://www.oyo.co.jp/
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» Offshore Hydrocarbon Mapping (OHM)
Provider of controlled source electromagnetic imaging (CSEMI) services, including surveying, data processing, and data interpretation services.
http://www.ohmsurveys.com/
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» Paterson, Grant and Watson Limited
Specialists in the management, processing and interpretation of airborne and ground geophysical surveys. Also offers a variety of non-exclusive international datasets.
http://www.pgw.on.ca/
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» Paulsson Geophysical Services, Inc.
Provides data acquisition, processing and interpretation services in the field of advanced 3D borehole seismology and massive 3D VSP. Includes hardware specifications and survey design parameters.
http://www.paulsson.com/
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» Pinemont Technologies Inc.
Electro-telluric sweep receiver data acquisition and navigation systems for environmental measurements and geophysical exploration.
http://www.pinemontgroup.com/
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» Polaris Explorer Ltd.
Conducts 2D and 3D seismic recording in extreme conditions, from sources that include dynamite, vibroseis, marine airguns and explorer accelerated weight drop system.
http://www.polarisexplorer.com/
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» Precision Geophysical, Inc.
Offers operating field crews and equipment for acquisition of seismic data.
http://www.precisiongeophysical.com/
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» Quantec Geoscience
Provides geophysical services to the mining industry with a focus on data acquisition, interpretation and survey execution.
http://www.quantecgeoscience.com/
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» Rock Solid Images
Solutions for seismic reservoir characterization, seismic attributes and rock physics.
http://www.rocksolidimages.com/
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» Roxicon AS
Specializes in 2D and 3D seismic merging of data sets and seismic velocity data.
http://www.geogrids.no/
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» SJ Geophysics Ltd.
Ground geophysical surveys for the mineral exploration, environmental and engineering industries, including induced polarization and resistivity, electromagnetic, gravity, magnetic, radiometric, and ground penetrating radar.
http://www.sjgeophysics.com/
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» SPC Geoken
Service company engaged in acquisition of geological, geophysical and engineering surveys.
http://www.geoken.com/eindex.php
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» Sander Geophysics Limited
Specializes in high resolution airborne magnetic, gravimetric and radiometric surveys using fixed-wing aircraft and helicopters.
http://www.sgl.com/
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» Scott Geophysics Ltd.
Specializes in induced polarization resistivity surveys. Other methods such as magnetometer and VLF-EM are also available. Additional processing and interpretation are offered, including inversion of IP and resistivity data.
http://www.scottgeophysics.ca/
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» SeaBed Geophysical AS
Specializing in marine multi-component seismic acquisition, and processing of marine streamer and ocean bottom seismic data.
http://www.seabed.no/
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» Seis Pros International
Seismic contracting for survey design, acquisition and processing. Includes a company history and portfolio of past projects.
http://www.seispros.com/
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» Seismic Exchange, Inc. (SEI)
2D and 3D seismic data marketing with proprietary databases in the Gulf of Mexico, domestic onshore and transition zone.
http://www.seismicexchange.com/
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» Seitel
Data library of land and marine surveys available for license. Includes an online GIS viewer for registered users to download detailed information.
http://www.seitel-inc.com/
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» Sevmorneftegeofizika (SMNG)
Marine geophysical contractor in Russia, offers 2D/3D marine seismic acquisition, navigation positioning, processing and integrated interpretation of seismic data.
http://www.smnggeophysics.com/
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» Spectral Geophysics
Contract surveys, processing and interpretation of ground geophysical Data, airborne magnetic, EM and radio-metric data.
http://www.spectralgeophysics.com/
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» Surveyaudit.com
A seismic survey audit firm specializing in survey and mapping computations for the exploration industry. Operating out of Calgary, Alberta, Canada.
http://surveyaudit.com/
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» TGC Industries, Inc.
Provides project management for acquisition of 3D seismic data and maintains a database of gravity and magnetic data for the U.S. and North America.
http://www.tgcseismic.com/
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» TGS-NOPEC Geophysical Company L.P.
Licenses seismic data and maintains collections of 2D and 3D multi-client data along with a database of digital well logs.
http://www.tgsnopec.com/
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» Terraquest Ltd
Specializes in airborne geophysical surveys, geophysical consulting, data interpretation, enhancement and modeling.
http://www.terraquest.ca/
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» The Online Geoscience Dictionary
The Online Geoscience Dictionary allows all registered users to access and update over 20000 Geoscience definitions. In addition Geoscientist users can trace old colleagues and have a technical discussion online.
http://www.geodictionary.com/
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» Tricon Geophysics, Inc.
Provides 3D and 2D seismic processing services including 3D pre-stack migration and depth imaging.
http://www.tricongeophysics.com/
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» UTS Geophysics
Ultra-high resolution airborne geophysical surveys, offering advanced data acquisition and processing of airborne magnetics single sensor and gradient, radiometrics, gravimetry and electromagnetics.
http://www.uts.com.au/
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» Ultramag Geophysics Pty. Ltd
Manufacture, sales and rentals, and magnetometer survey services. Includes information about the earth's magnetic field and case studies.
http://www.ultramag.com/
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» VSFusion
VSP processing services and borehole seismic application design, data processing, interpretation, and integration.
http://www.vsfusion.com/
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» Velseis Pty Ltd.
An Australian seismic exploration company providing a range of seismic technologies and contracting services for coal, mineral and hydrocarbon exploration.
http://www.velseis.com.au/
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» Wavefield Inseis AS
A Norwegian marine geophysical company that provides proprietary data acquisition services and offers a portfolio of non-exclusive multi-client data.
http://www.wavefield-inseis.com/
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» Zonge Engineering and Research Organization, Inc.
Equipment manufacturing and field services of electrical and electromagnetic methods for subsurface imaging applied to hydrological, hydrocarbon, environmental, engineering, and unexploded ordnance.
http://www.zonge.com/
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