NNC RK observation network.

Infrasound station “Aktyubinsk” (IS31, I31KZ)

A primary infrasound station of the International Monitoring System (IMS) “Aktyubinsk” IS31 (IS31KZ) is located at Tassay settlement of Chromtayu region, Aktyubinsk area.

Infrasound sensors – microbarometers МВ2000 and Aubrac digitizers are installed in bunkers. In total there are eight such equipment vaults. Systems H and L differ by device construction for wind interference suppression. L1 site, in addition, has a weather station. Sample rate: 20 samples/sec/channel. Seismic data are digitized according to GPS. Infrasound data are transferred to the Center Processing Facility via radio modems, and then together with seismic data of AKTO station to the IDC via a satellite channel.

Response and phase characteristics of the installed microbarometers are here.

Table 1
Coordinates of “Aktyubinsk” sites (IS31, I31KZ)

Site №
Seismometer, type
Borehole
depth, m
Latitude
Longitude
Elevation above
sea level, m
Notes
L1
MB2000
2
N50.40697
E58.03478
391
 
L2
MB2000
2
N50.41328
E58.04817
392.4
 
L3
MB2000
2
N50.39689
E58.03778
383.1
 
L4
MB2000
2
N50.41025
E58.01761
397.6
 
H1
MB2000
2
N50.40864
E58.03428
391.1
 
H2
MB2000
2
N50.40761
E58.03836
392.1
 
H3
MB2000
2
N50.405
E58.03678
391.8
 
H4
MB2000
2
N50.40603
E58.03339
390.2
 

Configuration of “Aktyubinsk” infrasound station (IS31, I31KZ)