The Seismic Monitoring (Strong Motion) of LBNL Buildings Program has the primary objective of providing accurate measurements of acceleration time histories during significant earthquakes that affect LBNL sites and site structures. The program consists of building monitoring systems and free field monitoring stations.
Equipment procurement, installation, and testing began on July 1, 2009 and was completed in 2012. A maintenance and system management effort is ongoing with real time data available to LBNL personnel.
The program consists of two types of stations/systems: building monitoring and free field monitoring. Building monitoring consists of strong motion accelerometers and recorders located in LBNL buildings. There are eight such systems monitoring eight buildings. Each building system is a stand-alone hardwired network of accelerometers located on the base slab and other parts of the structure. The accelerometers connect to a central recording system consisting of a battery-powered digital recorder, a GPS antenna for precision timing, and an Ethernet connection. The central recording systems are all located close to the base slab system on the ground floor or basement of the building. For some buildings, the base slab sensor and the recorder is the complete system. Other buildings have hardwired sensors from the central recorder to other parts on the structure. In general, sensors hardwired to other parts of a structure are located on the rooftop or top floor.
The free field stations record ground motion of the earth surface with accelerometers and seismometers. Currently, there are three free field stations, with each station consisting of an accelerometer, seismometer, GPS antenna, recording system, and radio telemetry system. The free field station data are transmitted by radio to UC Berkeley’s Berkeley Seismic Laboratory (BSL) for integration with the Berkeley Digital Seismic Network. To access the Berkeley Digital Seismic Network data or read more about the three free field stations, click on the applicable station name or request data from the archives.
|Free Field Station Name|
|Request Data from the Archive|