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Advanced Waveform Research Methods for GERESS Recordings

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Scientific rept. no. 1, 15 Feb 1990-14 Feb 1991

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The German Experimental Seismic Array System GERESS array project is a cooperative research program, jointly undertaken by Southern Methodist University Dallas, USA, and Ruhr-University Bochum in Germany. It is part of a multi-array network which includes NORESS, ARCESS, and FINESA in Scandinavia. This report summarizes research activities carried out at the array data centre in the Institute of Geophysics in Bochum. The inner ring of the array elements began recording in March 1990 and since then the number of active channels has gradually increased. Since August 1990, all 25 vertical short-period channels have been operational. The first chapter of this report contains a detailed description for GERESS including geographical coordinates, geological setting, and basic noise figures according to rules set up in the Sourcebook of the Group of Scientific Experts GSE in Geneva. The second chapter describes the instrumentation of the array, especially the system transfer function of the sensors installed at GERESS. Chapter 3 gives an overview of the status of the array as seen from the data centre in Bochum and documented in monthly status reports by our institute. To facilitate easy access to the GERESS data for remote users, an on-line Display Manager has been developed as described in chapter 4. Seismic waves of most of the presumed or announced underground nuclear explosions which were detonated in 1990 were detected at GERESS.

Subject Categories:

  • Seismology
  • Nuclear Weapons

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