About NNC RK Observation System.

Borovoye Seismic Array.

Borovoye Seismic Array is located n the North of the Republic of Kazakhstan in one of the most beautiful places of Borovoye resort.

Borvoye Geophysical Observatory started its operation in 1965, when a special expedition #4 of the Special Sector of the Institute of Physics of Earth under Academy of Sciences of the USSR was organized. One of its goals was to process a complex of geophysical nuclear explosions monitoring methods in different mediums and automation of geophysical research. Seismic method was leading in the complex of themethods used. In early 70-s a "Cross" and "Triangle" seismc array systems were designed for Borovoye, and their main task was to improve the effectiveness of registration of nuclear explosions originating at known test sites. "Cross" system started operation in October 1975. "Triangle" large aperture array started operation in the temporary points in 1976 - 1978 and in the permanent points in 1979. Borovoye large aperture seismic array is functioning till present. The layout is shown on a diagram.

The aperture of the array exceeds 100 km. Its configuration is a triangle which has Chkalovo, Vostochnoye and Zerenda stations at the tops, and Borovoye station in the center. Each of the remote stations is a so-called "Necklace" small arrays. "Necklaces" consist of six 1-component vertical seismic detectors, located on a 2 km circle and one 3-component station in the center. Between 1997 and 1999 each remote point of the "Triangle" had an autonomous "Pascal" data acquisition and registration system based on DAS Reftek.
New Quanterra Q680 seismic stations were installed in 1999 in all 4 points of Borovoye seismic array: Zerenda, Vostochnoye, Chkalovo and Borovoye.

Besides, a 3-component IRIS/IDA station was installed in Borovoye central point in 1994. Complete information about Borovoye seismic array is listed in the table below

Registraion of infrasound acoustic signals was resumed in Borovoye in 1999. The registration is performed using Quanterra equipment with "Globe" microphones and its own noise reduction system.