Sound Alert


Sounds from undersea earthquakes can predict if a massive tsunami is on its way. When earthquakes shake the ocean floor, they can trigger big killer waves and produce sound waves that move 10 times faster than ocean waves. Through computer modelling of acoustic data from the 2011 Japan tsunami, scientists have found that these sound waves are very sensitive to vertical sea floor uplift associated with a tsunami. The sonic signature, if captured in real time, could give scientists an idea about the height of the waves and provide 15 to 20 minutes of advance notice before a tsunami hits. 


Down To Earth, July 2013