Technology built for bomb tests could help confirm tornado touchdowns.
A tornado decimated parts of Tuscaloosa, Ala., in April 2011. By Maddie Stone Maddie Stone Bio February 23 at 10:43 AM Technology developed to detect nuclear weapons detonations from afar might help meteorologists track tornadoes.
Waxler’s team, which previously developed a state-of-the-art microphone for picking up infrasound, or sound below the range of human hearing, presented evidence at the American Meteorological Society meeting in Boston last month that tornadoes emit infrasonic signals that can be heard more than 50 miles away.
Doppler radar products can also detect the debris lofted by a tornado touchdown, offering radar confirmation of a twister. During the past few years, with additional funding in support of NOAA’s VORTEX Southeast campaign, Waxler’s group has continued this research, deploying a network of infrasound microphone arrays across northern Alabama. On March 19, 2018, a storm system passed over the region, spawning at least eight tornadoes that the team’s arrays picked up.
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