Meet Bison “Thumper” – our seismic weight drop…

TerraDat’s expertise in shallow seismic surveying to profile bedrock and map changes in subsurface engineering properties goes to another level with the recent acquisition of a powerful weight drop source. As far as we know, it’s the only one of its kind in the UK and has significant benefits over other seismic sources, not least it’s power and portability.

We acquired the equipment in 2017 and it has undergone extensive refurbishment at our HQ in South Wales. The US-manufactured Bison EWG ‘Thumper’ model 1417-2 2 elastomers 5000x150x15mm accelerating a 350kg weight onto a 814x814x50mm UHMWPE (ultra-high molecular weight polyethylene) plate.

Target depths of up to 1km in favourable conditions. Available to hire (with a team), or as part of our enhanced seismic acquisition and processing service.

Read more about how seismic surveys can enhance understanding of subsurface geology here.

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Meet Bison “Thumper” – our seismic weight drop…

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TerraDat uses state-of-the-art geophysical mapping techniques to map the subsurface. The benefit of geophysics is that it is non-invasive and can rapidly map large areas and reduce the chance of missing buried targets. We’ve been offering our services for over 25 years to clients from the engineering, environmental, energy and construction markets. Here are four case study booklets showing how geophysics can be applied to your ground investigations.

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Meet Bison “Thumper” – our seismic weight drop…