1. Earth and Environmental Sciences Area Lawrence Berkeley National Laboratory 1 Cyclotron Road, MS 74R0120 Berkeley California 94720‐8099 USA
2. Department of Civil and Environmental Engineering University of California, Berkeley Berkeley California 94720‐1710 USA
3. Beijing Institute of Aerospace Control Devices Beijing Engineering Research Center of Optical Fiber Sensing System Beijing China
4. Centre for Smart Infrastructure and Construction University of Cambridge Cambridge UK
5. Epsimon Ltd Steeple Morden UK