L. Kolesnykov¹ , O. Liashchuk¹

¹Main Centre of Special Monitoring (NDC of Ukraine), State Space Agency of Ukraine, Gorodok, Ukraine

Abstract:

Mining explosions pose a big problem for the Ukrainian seismic networks in its process of monitoring the compliance to the CTBT. Identifying industrial explosions is possible though a number of criteria (time of the explosion and the day of the week, strength, and location). But in the same regions earthquakes periodically occur, including those due to induced seismicity. In addition there are events caused by emergencies and combat operations. Therefore, the separation and identification of the different types of events, and determination of level of risk to the public is an important task. One way to solve it is to use a combination of geophysical methods (seismic and infrasound), which is implemented in the MCSM. For known mines a database was created that includes their location, distance to the observation sites and travel times of seismic and infrasound waves from the source to the observation sites, and azimuth to the source. As a result of this, the identification process may be done automatically after the selection of seismic and infrasound waves. The presence of infrasound waves can indicate an event that could result in an emergency. The availability of three small-aperture infrasonic stations at MCSM enables the location of all local, powerful events, which generate acoustic waves.