Detectability and reliability analysis of the local seismic network in Pakistan

The detectability and reliability analysis for the local seismic network is performed employing by Bungum and Husebye technique. The events were relocated using standard computer codes for hypocentral locations. The de-tectability levels are estimated from the twenty-five years of recorded data in terms of 50%, 90% and 100% cumu-lative detectability thresholds, which were derived from frequency-magnitude distribution. From this analysis the 100% level of detectability of the network is ML=1.7 for events which occur within the network. The accuracy in hypocentral solutions of the network is investigated by considering the fixed real hypocenter within the network. The epicentral errors are found to be less than 4 km when the events occur within the network. Finally, the prob-lems faced during continuous operation of the local network, which effects its detectability, are discussed.