In an alarming twist, Michael Poland, the scientist-in-charge at the Yellowstone Volcano Observatory, declared that a ‘seismic vibrator’ had been used to trigger the quakes.
The so-called “vibroseis,” or ‘seismic vibrator,’ is a truck-mounted device that is capable of injecting low-frequency vibrations deep into the earth.
Dr Poland confirmed that the USGS had deployed this machine to induce a swarm of quakes in the area as part of an experiment.
The test, carried out by the University of Utah and University of New Mexico, was intended to create images of the Yellowstone’s magma chamber — the so-called “supervolcano”.
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