A. Mukambayev¹ , N. Mikhailova² , A. Smirnov²

¹Kazakhstan National Data Centre
²Institute of Geophysical Research ME RK

Abstract:

This work discusses the contribution of IMS stations in Kazakhstan into the REB in terms of the number of associated phases as compared to other IMS stations. It is shown that all Kazakhstan stations are effective in monitoring, and are among the most efficient IMS stations. This observation is also confirmed by global mapping of event epicenters as well as by threshold magnitude and the proportion of events with arrivals at the Kazakhstan stations in the REB. A detailed comparison of the REB and the KazNDC bulletins, seismic and infrasound, are carried out within Central Asia (CA). The number of events in the KazNDC bulletins is larger than that in the REB as the KazNDC bulletin is obtained using the regional network with a larger number of stations. There are 398 seismic events in the REB for the investigated territory. The KazNDC seismic bulletin contains a significantly larger number of events - 13839. Actual location accuracy for the CA events in the REB can be estimated by GT events only. We present such examples using locations obtained by a special local monitoring network and those in the REB for the events within western Kazakhstan.