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NNC RK observation network

“Kurchatov-Cross” seismic array (KURK, AS058)

The auxiliary seismic array of the International Monitoring System (IMS) “Kurchatov-Cross” (KURK, AS058) is located at East-Kazakhstan area near Kurchatov town. 80% of the array elements territory are effusive-sedimentary formations of Carboniferous period frequently overlapped by cover of friable Cenozoic deposits of different thickness.

“Kurchatov-Cross” seismic array represents two intersecting linear lines of equipment boreholes with seismic sensors (seismic array sheme). Lines extension azimuths: 10°(meridian line, KUR1-KUR10) and 320° (east-west line, KUR11-KUR20). Length of each line is ~22,5 km. Each line has 10 equipment boreholes (sites) with a common central site at the place of lines intersection. Average distance between the sites of the lines is ~ 2,25 km . Vertical seismometers CMG-3V (KUR1-KUR20) are installed in the boreholes. CMG-3TB seismometer is installed at the center (KUR21, KUR BB). All seismometers were manufactured by Guralp Company. Recording instruments are 24-bit ADC Europa-T (Nanometrics). Sample rate: 40 samples/sec/channel. Seismic data are digitized according to GPS. In December 2006 the station was certified by the IMS commission as a primary IMS station.

Response and phase characteristics of the seismometers installed at the station are here.

Table 1
Coordinates and depth of “Kurchatov-Cross” (KURK, AS058) seismic array boreholes

Site №
Seismometer, type
Borehole
depth, m
Latitude
Longitude
Elevation above
sea level, m
Notes
KURBB
CMG-3TB
52
N50.6226
E78.5304
199,8
three-component
KUR01
CMG-3V
35,6
N50.7216
E78.5634
164,6
vertical
KUR02
CMG-3V
50
N50.7017
E78.5566
169
vertical
KUR03
CMG-3V
32
N50.6820
E78.5500
175
vertical
KUR04
CMG-3V
38,9
N50.6622
E78.5434
177,4
vertical
KUR05
CMG-3V
27,5
N50.6424
E78.5366
183
vertical
KUR06
CMG-3V
35
N50.6028
E78.5239
196,5
vertical
KUR07
CMG-3V
37,5
N50.5831
E78.5172
200
vertical
KUR08
CMG-3V
39
N50.5632
E78.5108
200,8
vertical
KUR09
CMG-3V
29,5
N50.5433
E78.5043
201,2
vertical
KUR10
CMG-3V
36,2
N50.5236
E78.4977
205,4
vertical
KUR11
CMG-3V
30
N50.6019
E78.6863
202,4
vertical
KUR12
CMG-3V
34,1
N50.6061
E78.6551
204,0
vertical
KUR13
CMG-3V
44,4
N50.6102
E78.6242
224,4
vertical
KUR14
CMG-3V
38,2
N50.6144
E78.5927
217
vertical
KUR15
CMG-3V
36
N50.6185
E78.5615
200,7
vertical
KUR16
CMG-3V
32,7
N50.6269
E78.4993
194,4
vertical
KUR17
CMG-3V
38,3
N50.6318
E78.4690
196,6
vertical
KUR18
CMG-3V
49,4
N50.6353
E78.4368
192,4
vertical
KUR19
CMG-3V
26,5
N50.6394
E78.4057
181,8
vertical
KUR20
CMG-3V
50
N50.6436
E78.3746
183,4
vertical

Communication system of “Kurchatov-Cross” seismic array (KURK, AS058)

Information from remote sites of the seismic array is transferred via radiotelemetric channels to the Central Recording Facility – CRF. Further, via satellite channel the information is forwarded to the International Data Center in Vienna. The second data stream from all remote sites is transferred via KUR01 to local data acquisition facility – TS2.

From the IDC (Vienna) seismic information is transferred to KNDC (Almaty).