UC San Diego reserach (IMAGE) University of California - San Diego Caption Staggered introduction of shelter-in-place ordinances. States and cities in the spring of 2020 turned first to shelter-in-place ordinances to try to mitigate the spread of the coronavirus. The authors of this study examined large quantities of geolocated cellular phone device use patterns. This information helped them assess compliance with stay-at-home orders. Credit UC San Diego 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.