The Factor building has a Kinemetrics FBA-11 accelerometer network composed of four horizontal channels per floor except for the basement and subbasement which have two vertical and two horizontal channels each (Fig. 1). The horizontal sensors are oriented north-south and east-west along the mid-sections of most floors (Fig. 1). The force-balance accelerometer sensors have a natural frequency of 50 Hz, normal damping at 70% of critical, and a dynamic range of 135 dB from 0.01 to 50 Hz. The output range scale is ±4g. The digitizers, located in the building's top floor, consist of 9 Quanterra 4128s, each recording 8 channels of continuous data. The system is configured to send 500 sps wavefomr data to a RAID in the building and 100 sps data to a UCLA Seismology RAID. The system generates ~3 Gbytes of data per day. The Antelope real-time software monitoring system is used to monitor the network's state of health, and to archive the data both locally and at the IRIS DMC. GPS antenna are installed on the roof. The power sources for the digitizers and sensors are also located in the penthouse.

In July, 2005, a 100-m-deep borehole and an overhead surface seismometer were installed in the nearby Botanical Gardens ~25 m from the building. They consist of a 3-component shallow 1g Episensor at 100 meters depth (Kinemetrics SBEPI-110) and a 2g Episensor at the surface, both connected to a Quanterra 4128. The GPS antennae is on the roof of the building. The waveform data from the borehole seismometers are included in the array datasets being archived onsite and at the IRIS Data Management Center.

See the following link for the miniseed filenaming convention used by the array and the IRIS Data Management Center:

For spreadsheets showing the physical locations of the sensors and wiring boxes within the Factor building, hardware serial numbers, manufacturers and makes, sensor-to-digitizer mapping, and sensor orientations, see