Reglonal and river valley networks of seismological stations maintained by the India Meteorological Department and other Institutions have been discussed. A brief summary of significant results obtained through the local networks around river valley projects has also been presented, for assessment of earthquake risk. Comparison of the seismicity during the pre-impounding perlod with that after filling up of the reservoir did not show any significant change so far around Pong and Pandoh Dams, However for monitoring such activity the obser- vations need to be continued for a very long time.