FIELD AND OBSERVATORY GEOMAGNETIC MEASUREMENTS IN BULGARIA

  • IVAN A. BUTCHVAROV
  • ILIYA V. CHOLAKOV
Part of the NATO Security through Science Series book series

Abstract

Historical and recent geomagnetic measurements and geomagnetic maps of Bulgaria are given. A brief description of the Geomagnetic Observatory – Panagjuriste is included. The observatory measurements, records, calculations of the geomagnetic elements, and the geomagnetic data organization in the observatory are described.

Keywords

Quartz Azimuth Geophysics Novi 

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References

  1. Butchvarov, I., 1977, An application of the regression analysis for processing of geophysical fields and their mapping, Bulg. Geophys. J. III (4): 74–81 (in Russian).Google Scholar
  2. Butchvarov, I., 2005, Processing and organization of the data obtained from the analog magnetograms of Panagjuriste Geomagnetic Observatory. Bulg. Geophys. J (in print).Google Scholar
  3. Butchvarov, I. and Cholakov, I., 1992, Normal geomagnetic field in Bulgaria, epoch 1980.0, Bulg. Geophys. J. XVIII (4): 65–73 (in Bulgarian).Google Scholar
  4. Butchvarov, I. and Cholakov, I., 1994, Geomagnetic field on the territory of Bulgaria – epoch 1990.0, Bulg. Geophys. J. XX (4): 57–66 (in Bulgarian).Google Scholar
  5. Butchvarov, I. and Cholakov, I., 1995, Anomalous geomagnetic fields in Bulgaria, epoch 1980.0, Bulg. Geophys. J. XXI (4): 59–72 (in Bulgarian).Google Scholar
  6. Butchvarov, I. and Kostov, K., 1981, Presentation of the geomagnetic field in Bulgaria for the epochs 1960.0, 1965.0 and 1970.0 with a polynomial of second degree of the geographical coordinates, Bulg. Geophys. J. VII (4): 51–62 (in Russian).Google Scholar
  7. Butchvarov, I., Kostov, K., Cholakov, I., Georgiev, H. and Chekardjikov, L., 1984, Conclusions on the precision of the absolute geomagnetic survey on the territory of People’s Republic of Bulgaria in 1958–1961 and 1978–1980, Bulg. Geophys. J. X (3): 117–126 (in Bulgarian).Google Scholar
  8. Cholakov, I. and Butchvarov, I., 1995, Absolute geomagnetic level of the Panagjuriste Geomagnetic Observatory in the period 1934–1993, Bulg. Geophys. J. XXI (4): 109–114 (in Bulgarian).Google Scholar
  9. Georgiev H., C., Kostov, K. and Cholakov, I., 1986, Isopors of the declination for the 1940–1980, Bulg. Geophys. J. XII (3): 40–48 (in Bulgarian).Google Scholar
  10. Kalfin, C., 1939, Magnetic measurements in Bulgaria, Yearbook of State Geogr. Inst, 1937–1938: 58–73 (in Bulgarian).Google Scholar
  11. Kostov, K. and Butchvarov, I., 1969, Normal geomagnetic field in Bulgaria, epoch 1960.0, Bull. Geophys. Inst. XV: 33–47 (in Bulgarian).Google Scholar
  12. Kostov, K., 1971, Magnetic measurements in Bulgaria 1958–1961, Bull. Geophys. Inst. XVII: 87–98 (in Bulgarian).Google Scholar
  13. Kostov, K. and Nozharov, P., 1987, Absolute geomagnetic measurements in Bulgaria 1787–1987 (Archives Pangjuriste Geomagnetic Observatory, in Bulgarian).Google Scholar
  14. Kostov, K., Cholakov, I. and Butchvarov, I., 1991, The geomagnetic field on the territory of Bulgaria–epoch 1980.0, Bulg. Geophys. J. XXII (2): 42–53.Google Scholar
  15. Linnik, U., 1962, The method of least squares and basis of mathematical-statistical theory of observation treatment, Fizmatgiz, Moscow (in Russian).Google Scholar
  16. Mintchev, M., 1979, Analysis of the Azimuthal measurements with gyrotheodolite, Geodesy, Cartography and Land regulation, XIX (6): 77–93 (in Bulgarian).Google Scholar
  17. Wilks, S., 1967, Mathematical Statistics, Nauka, Moscow (in Russian).Google Scholar

Copyright information

© Springer 2006

Authors and Affiliations

  • IVAN A. BUTCHVAROV
    • 1
  • ILIYA V. CHOLAKOV
    • 2
  1. 1.Geophysical InstituteSofiaBulgaria
  2. 2.Geomagnetic Observatory of the Geophysical InstituteSofiaBulgaria

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