Showing results for: geophysics monitoring News
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Watch NMR Webinar by Vista Clara’s Dave Walsh for South African Geophysical Association
On October 21, 2020, Vista Clara CEO, Dave Walsh presented an extensive webinar on “Magnetic Resonance for Groundwater Investigations” for the South African Geophysical Association (SAGA). The webinar abstract includes the following description: The NMR measurement technique has been adapted in several forms for geophysical applications, and in recent years has been used more widely ...
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ASTM D6429 - 99(2011)e1 standard guide for selecting surface geophysical methods
This guide applies to commonly used surface geophysical methods for those applications listed in Table 1. The rating system used in Table 1 is based upon the ability of each method to produce results under average field conditions when compared to other methods applied to the same application. An “A” rating implies a preferred method and a “B” rating implies an alternate ...
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Geostatistics regains interest in the characterization of chemical soil pollutions
To evaluate the pollution impact, such characterization is usually based on various data that should be interpreted and analyzed with an estimation of related uncertainties. Geostatistics has been suitably applied in this framework for about fifteen years. Several Ph.D. theses have been dedicated to the subject, both for chemical and radiological pollution (see for instance this article in ...
By Geovariances
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Update from the Field: Pumps in Place, Piping Assembled
The Newberry site has been busy with AltaRock staff and contractors assembling stimulation infrastructure over the last few weeks. We’re happy to report that the pumps are in place, generators have been wired in and piping has been welded up. All the equipment has been pressure tested and is up and running as planned. Last night, we started to cool the with low-flow cold water injection. ...
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NSG 2019
Near Surface Geoscience Conference & Exhibition 2019 9-11 September 2019, The Hague, Netherlands We are pleased to announce our participation and look forward to meeting you in the Hague! This edition will host the 25th European Meeting of Environmental and Engineering Geophysics along with three parallel events: 1st International Conference on Geophysics for Geothermal and Renewable ...
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High resolution multi-level monitoring for bedrock aquifers
This presentation describes a comprehensive approach for determining the nature, extent, transport and fate of contaminants at industrial sites on fractured rock, with emphasis on sedimentary rock, referred to as the Discrete Fracture Network (DFN) approach. Development of this DFN approach began at a sandstone site in California in 1997, where the initial version of a method for measuring ...
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ASTM D5777 - 00(2011)e1 standard guide for using the seismic refraction method for subsurface investigation
This guide summarizes the equipment, field procedures, and interpretation methods used for the determination of the depth, thickness and the seismic velocity of subsurface soil and rock or engineered materials, using the seismic refraction method. Measurement of subsurface conditions by the seismic refraction method requires a seismic energy source, trigger cable (or radio link), geophones, ...
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Ancient glacial sediments drag down Louisiana`s sinking coast
Sediments deposited into the Mississippi River Delta thousands of years ago when North America's glaciers retreated are contributing to the ongoing sinking of Louisiana's coastline, finds new research by NASA and scientists at Louisiana State University. The weight of these sediments is causing a large section of Earth's crust to sag at a rate of 0.04 to 0.3 inches a year, the study ...
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ESA launches GOCE - heralds new chapter in Earth observation
This week, the Gravity field and steady-state Ocean Circulation Explorer (GOCE) satellite developed by the European Space Agency (ESA) was lofted into a near-Sun-synchronous, low Earth orbit by a Rockot launcher lifting off from the Plesetsk cosmodrome in northern Russia. With this launch, a new chapter in the history of Earth observation in Europe has begun. GOCE is the first of a new family of ...
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