HR: 1340h
AN: S13B-1069    [Abstracts]
TI: Extension to High Frequencies of the Experiment Capability of SEIS-UK
AU: * Brisbourne, A
EM: amb27@le.ac.uk
AF: SEIS-UK, University of Leicester University Road, Leicester, LE1 7RH United Kingdom
AU: Horleston, A
EM: ach17@le.ac.uk
AF: SEIS-UK, University of Leicester University Road, Leicester, LE1 7RH United Kingdom
AU: Denton, P
EM: pdt@le.ac.uk
AF: SEIS-UK, University of Leicester University Road, Leicester, LE1 7RH United Kingdom
AB: The seismic equipment facility serving the UK academic community, SEIS-UK, has recently purchased 15 high frequency seismic recording systems capable of sampling at up to 24kHz. A suite of 3 component 30Hz geophones and piezoelectric accelerometers has also been acquired. The SAQS systems, designed and built by ISS International of South Africa, represent a significant extension in the capability of the SEIS-UK facility. The units record 24bit data from 6 channels, at sample rates of 50Hz to 24kHz, in continuous or triggered mode. An external GPS antenna and removable hard disk allow the systems to run autonomously. The 6 channels can be configured as any combination of tri-, bi- or uni-axial systems. The recording systems are also compatible with broadband seismometers. Although originally designed for the purpose of hardrock mine monitoring, the SAQS system is a good solution for a range of high frequency seismic monitoring experiments, especially controlled source or high-resolution surveys. The SEIS-UK systems have been modified with disk-heaters to extend the environmental operating capability. The addition of an external GPS antenna means the units can be used in the same way as any other passive seismic field system. However, the functionality of the recorder is significantly greater than that of many standard seismic systems. The equipment is currently loaned to the British Antarctic Survey for use as part of a large multi-disciplinary experiment on the Rutford Ice Stream in Antarctica. The instruments will be deployed in an array centred on the main sub-glacial access hole. Instruments will detect events from the bed of the glacier with the aim of investigating the ice flow mechanisms and for determining the relationship between the ice sheet, sub-glacial bed and tidal motion.
UR: http://www.le.ac.uk/seis-uk
DE: 7294 Instruments and techniques
SC: Seismology [S]
MN: 2004 AGU Fall Meeting