In this note we report on the progress of the Canadian geophysics research project known as POLARIS (Portable Observatories for Lithospheric Analysis and Research Investigating Seismicity). POLARIS is a multi-institutional infrastructure composed of mobile geophysical observatories that transmit continuous real-time data to research centers using a satellite-telemetry communications system. The major components of POLARIS, when fully installed in 2004, will be 90 seismograph and 30 magnetotelluric (MT) mobile field systems, complementary data-acquisition and satellite-communications equipment, and satellite downlink facilities. The seismograph network is three subarrays of 30 three-component broadband seismographs, sampling at...

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