Undershooting the East Pacific Rise (IMAGE) University of Oregon Caption Perspective view of East Pacific Rise and the seismic velocity structure of the underlying mantle. Surprisingly, regions of magma storage in the mantle (shown as orange and red colors) are in many places not centered beneath the plate plate boundary. Credit Courtesy Douglas Toomey Usage Restrictions Must credit Douglas Toomey License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.