Seismic Map (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption By coupling DAS technology with dark fiber, Berkeley Lab researchers were able to detect both local and distant earthquakes, from Berkeley to Gilroy, California, to Chiapas, Mexico. Credit Ajo-Franklin/Berkeley Lab Usage Restrictions Credit Ajo-Franklin/Berkeley Lab 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.