The GMS is the ground breaking second generation of the GeoSIG Measuring Systems with extended connectivity capability and flexibility. The unit is developed in close coordination with USGS and deployed in high quantities in North America establishing the NetQuakes system. It includes an Ethernet connection and optionally a 2.4 GHz Wi-Fi module to insure fast and reliable data transfer. Its design and efficiency makes it the first choice for any application requiring seismic instruments. With its optimized installation, operation and maintenance philosophy, the GMS offers the real possibility to implement such as high density arrays with total operating costs at a small fraction of conventional strong-motion seismograph networks.

The instrument’s software processes data in real time. If triggered by a seismic event, GMS calculates Peak Ground Acceleration (PGA), Peak Ground Velocity (PGV), Peak Ground Displacement (PGD) and Response Spectrum (RSA) at various frequencies of the event. GMS can report these parameters, which are related to the strength of shaking, to a data centre where a synopsis (such as a shakemap) for disaster management facilities can be generated in almost real time over the Internet. An event file is also recorded in the memory, which is sent out from the instrument and also securely accessible over the Internet.

GMS is self-contained and is equipped with an uninterruptible power-supply, which provides, excluding options, more than 24 hours emergency operation without external power. Since the battery and power management are critical components in applications, excessive care has been taken in the charger design.

Parameter Name	Parameter Value
Type	event
Measured physical value	motion, seismic, density
Other characteristics	Ethernet wireless