NNC RK observation network

Makanchi seismic array (MKAR, PS23)


A primary seismic array of the International Monitoring System (IMS) – (MKAR, PS23) is located at Urdzhar region of East-Kazakhstan area 25 km away from Makanchi settlement. The site is located in north-east part of granitoid massif of upper Paleozoic age (ɣPz3III) breaking effusive-tuffaceous deposits of Famennian age (D3fm).

Makanchi seismic array consists of 10 observation points along two circles with one central point. Radius of the inner circle is ~500 m, radius of the outer ~2000 m. 9 sites have one-component vertical borehole seismometers GS21 (Geotech Instruments). In addition, there is one broad-band three-component station with CMG-3TB (Guralp) seismometer. Recording instruments are 24-bit ADC AIM24S (Science Horizons). Sample rate: 40 samples/sec/channel. Seismic data are digitized according to GPS. In January 2002 the station was certified by the IMS commission as a primary IMS station. Coordinates and parameters of the boreholes, where the seismometers are installed, are listed in the Table 1.

Response and phase characteristics of the installed seismometers are here.

Table 1
Coordinates and depth of “Makanchi” (MKAR, PS23) seismic array boreholes

Site №
Seismometer, type
Borehole
depth, m
Latitude
Longitude
Elevation above
sea level, m
Notes
MK31
CMG-3TB
61
N46.7937
E82.2904
615
three-component
MK01
GS 21
31
N46.7700
E82.3003
609
vertical
MK02
GS 21
30.5
N46.7694
E82.3086
639
vertical
MK03
GS 21
30.5
N46.7656
E82.3015
631
vertical
MK04
GS 21
31
N46.7715
E82.2951
590
vertical
MK05
GS 21
31
N46.7937
E82.2913
615
vertical
MK06
GS 21
31
N46.7751
E82.3133
638
vertical
MK07
GS 21
31
N46.7538
E82.3156
628
vertical
MK08
GS 21
31
N46.7561
E82.2866
608
vertical
MK09
GS 21
31
N46.7744
E82.2769
580
vertical

Communication structure of “Makanchi” (MKAR, PS23) seismic array

The data from the remote elements of Makanchi seismic array MK01 – MK31 via telemetric channels is sent to the central data acquisition point, where three incoming data streams are merged into one outgoing which is forwarded to the International Data Center in Vienna and to the Data Center in Almaty via satellite channels. The system is operated remotely from the central data acquisition point and the Data Center. From the Almaty Data Center the data are sent in real time to US National Data Center (USNDC) in Florida (USA).