Ruth Gardner's Blog 11/01/2014: Sumner Sirens
Articles, UC QuakeStudies
An entry from Ruth Gardner's Blog for 11 January 2014 entitled, "Sumner Sirens".
An entry from Ruth Gardner's Blog for 11 January 2014 entitled, "Sumner Sirens".
A document describing the early warning system to alert team members of ground and structural movement at the Arch.