Trapped OBS (IMAGE) Columbia Climate School Caption One of the ocean bottom seismometers trapped in fresh lava on the East Pacific Rise. The flag on top is used to help locate the device when it surfaces. Credit Woods Hole Oceanographic Institution, National Science Foundation, Ridge 2000 Usage Restrictions None 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.