Global Seismology

Regional seismic monitoring with wide-spread independent stations

Operation

A wide-spread network of independent GS_data_acquisition units independently records regional seismicity for later analysis on the seismic_controller. The seismic controller is also used for the occasional field-configuration of the SAQS units.

Communications

Use of common cellular and fixed-line telephone modems here minimises infrastructural set-up costs. At midnight every day all seismic stations are contacted and seismic information downloaded. Seismograms of common events are post-associated for off-line processing and interpretation.

Power

The low power consumption of the GS (less than 1W/channel) allows use of an inexpensive solar panel and battery unit, making the seismic station completely independent.

Seismic Sensors

Each GS data acquisition unit can monitor and pre-process up to six seismic signals, in any combination of uni-, bi- or tri-axial seismic sensors. For each seismic channel up to 3 logical channels may be extracted with GS technology. Both geophones and accelerometers (piezoelectric and Force-Balance) are currently supported. Here low-frequency (1 Hz natural frequency) tri-axial geophones are used.

Seismic Data Processing & Interpretation

The seismograms of every seismic event that triggers multiple stations are post-associated on the seismic controller. Seismograms are then exported to SEISAN format for processing with a tectonic seismology package

This page last updated: January 2007