An auxiliary seismic station of the International Monitoring System (IMS) “Aktyubinsk” AS-059 (AKTO) is located in the south-east part of Tassay settlement, Chromtayu region, Aktyubinsk area. Geological structure of the site is the following: the sensor is installed in a borehole of the equipment vault, on the top of a hill composed of diorite. Diorites made up a small dykeform body breaking Silurian habbro-amphibolite.
Seismic sensor at the station – CMG-3TB of Guralp Company is installed in a borehole at 65 m depth. Recording instruments are 24-bit ADC Europa-T (Nanometrics). Sample rate: 40 samples/sec/channel. Seismic data are digitized according to GPS. The station was certified by the IMS commission on November 10, 2005.
Response and phase characteristics of the installed seismometers are here.
Table 1
“Aktyubinsk” station (AS059, AKTO) coordinates
| Site № | Seismometer, type | Borehole depth, m | Latitude | Longitude | Elevation above sea level, m | Notes |
| AKTO | CMG-3TB | 65 | 50.4348 | 58.0164 | 380 | three-component |
Configuration of “Aktyubinsk” seismic station (AS059, AKTO)
