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Digital Subscriptions > Rock&Gem Magazine > April 2019 > EARTH SCIENCE IN THE NEWS

EARTH SCIENCE IN THE NEWS

MONITORING VOLCANO SOUNDS AND EXPLORING THE FAR SIDE OF THE MOON

Infrasound Signals Aid in Forecasting Volcanic Eruptions

National Public Radio’s “Science Friday” featured a January 25 interview with Boise State University professor of geophysics Jeff rey Johnson. Dr. Johnson reported how scientists have long relied on seismic readings of micro-tremblors and earthquakes in predicting when a volcano might blow its top, but techniques involving “infrasound” are proving more reliable.

Active volcanoes constantly produce a medley of audible and subaudible sounds. Audible sounds are those we humans can hear. Low-frequency subaudible sounds (below 20 Hz) must be captured in recordings and then sped up into the audible range. Such sound waves travel up and through a volcano and inform anyone with the ability to listen about things such as a lava lake deep within a volcano as it begins to rise

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Rock & Gem April 2019, WorkShops in the Wild : Lifelong Learning at Wildacres, Emergence of Flourescence, Bladed Barite : In the East Potrillo Mountains, And More....