Assessment of the effectiveness of the early warning system for severe earthquakes in a rare network of seismic stations

Abstract

Purpose. Development of an early warning system for strong earthquakes in a rare network of seismic stations.

Methods. Research is carried out in three directions: operational automatic generation of isoseist maps after the event, creation of accelerometers with the ability to send data to a central server with subsequent calculation of the expected intensity of the oscillations and the waiting time of the event, and the development of a device that continuously calculates the oscillation spectrum from the vertical component and gives a signal upon receiving a wave with a period of more than 2 s and the magnitude of the accelerations of a certain value.

Findings. The dependences of the magnitude of the earthquake on the period of the P-wave and the peak amplitude of the displacement of the soil are obtained. A system for automatically constructing maps of isoseist strong events has been created, a server has been launched to collect data from remote stations, which sends a warning about an expected earthquake via telegram-bot.

Application field of research. The results obtained make it possible to implement a warning system about strong earthquakes, which can be used in the Ministry for Emergencies to assess the situation, protect critical facilities (dams of large reservoirs, nuclear power plants, etc.) quickly.