Field blast studies are conducted to determine if soil will liquefy under earthquake loading. A predetermined explosive charge is buried in a cased borehole. Acceleration, pore water pressure, and settlement gauges are placed nearby. When detonated, the blast records acceleration, pore water pressure rise, and ground settlement. This data is interpreted to evaluate liquefaction potential. One such study found that a blast equivalent to 19.6 cycles of 0.075g acceleration generated a 1.74m pore water pressure rise, indicating complete liquefaction would occur during an earthquake.