Seismic Refraction Tomography

In engineering situations, SRT is mainly used to define the depth of bedrock as well as groundwater below the surface.

SRT can be scaled up from small sites to large-scale developments which makes it incredibly versatile. As with other seismic methods, SRT uses a series of sensors (geophones), spaced at equal distances. These geophones are pushed into the ground on a spike to ensure good contact with the ground and maximise the signal strength and data points are collected at set intervals along the line. The data points are generated using either a sledgehammer or an accelerated weight drop hitting an aluminium plate.

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The SRT method can be used for many applications such as:

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• Depth and shape of bedrock 

• Location of faults

• Location of old, buried river channels

• Find the thickness of different soil layer