Coda waves reveal carbon dioxide storage plumePosted on February 27, 2019
Pumping carbon dioxide into the ground to remove it from the atmosphere is one way to lower greenhouse gases, but keeping track of where that gas is, has been a difficult chore. Now, a team of researchers from Penn State and Lawrence Berkley National Laboratory are using previously ignored seismic waves to pinpoint and track the gas clouds.
“We usually don’t look at coda waves, we usually throw them out,” said Tieyuan Zhu, Penn State professor of geophysics and Institute for CyberScience (ICS) associate. “If we look at a carbon dioxide plume underground with P waves we don’t see any change in shape, but if we use the late-arriving waves, the coda waves, we see a change.”