Pinpointing the sound of rock failure

Supervised machine learning found that negative turning (black points) and positive turning (white points) amplitude measurements across a neutral zero line (grey points) happened in concert with rock fracture moments. Credit: Rui Liu, Texas A&M Engineering

If a rock deep in the subsurface cracks and fails under pressure and temperature change, can the sound it makes be heard and identified? Finding the specific sound a rock makes when it cracks and breaks seems impossible when surrounded by other subsurface noises.

But Texas A&M University researcher Dr. Siddharth Misra, the Ted H. Smith, Jr. ’75 and Max …
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