article_snippet: Professor Tromp has so far looked at seismic waves from 3,000 quakes of magnitude 5.5 and greater, which were recorded at thousands of seismographic stations worldwide.
article_snippet: We are specifically interested in the structure of mantle upwellings and plumes,' said Professor Tromp, 'but much of it will be investigating the images for unusual features.'
article_snippet: Professor Tromp technique uses both waves that travel from the quake epicentre to the detector as well as those that travel from the detector to the quake – described as adjoint waves.
article_snippet: Professor Tromp said: 'You don't know what it is you are looking for…that is the wonderful part of this project - waiting to see what we will discover.'