Description: In the article the necessity of the use of facilities of the Main center of the special control is rotined as informative elements of the system of monitoring, prognostication and prevention of extraordinary situations. The examples of seismic supervisions registration of the Main center of the special control of natural and technogenic origin extraordinary situations a network are resulted. The indexes of functional efficiency of seismic supervisions network most critical from which is time of information receipt about an extraordinary situation are certain. The estimation of time of measuring information receipt from the seismic supervisions network is conducted .
Keywords: monitoring, seismic signal, network of seismic supervisions