Seismic refraction data is collected from geophones that record the arrival of energy sent through the shallow subsurface by sledgehammer blows at the surface. Alec Spears (left) and Troy Covill were ...
A low-energy (tamper) seismic refraction survey of a volcanic ash (Pearlette) deposit reveals that the deposit lies in a shallow, north-south trending, near-linear depression. The ash deposit is ...
The study of earthquakes called Seismology, relies on the fact that different materials within the Earth react differently to stress. When a fault slips, energy radiates outward from the focus (the ...
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