Sills (IMAGE) California Institute of Technology Caption More than 192,000 small seismic events, each represented here as a single black dot, reveal in 3D the shape and location of the sills beneath Hawai‘i. Credit Caltech/Wilding et al Usage Restrictions For use in news stories only License Original 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.