Wang Xin, and Tong Junwei, 2015.

Much of the data collected on the field for The Ratu River Expedition was by using a massive truck called the EnviroVibe. This truck vibrates the ground between 10 to 300 pulses per second, sending sound waves up to 2 kilometers deep. The sound waves reflecting off the rock layers are used to visualize the faults and underground structure.

raturiver.com

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