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Tectonomagnetic Studies in Tajikistan

  • Yu. P. Skovorodkin
  • L. S. Bezuglaya
  • T. V. Guseva
Conference paper
  • 38 Downloads
Part of the Advances in Earth and Planetary Sciences book series (AEPS, volume 5)

Abstract

High-precision simultaneous observations of the geomagnetic field have been made over areas with fault displacements and junctions of mountain structures in Tajikistan using proton magnetometers MPP-1 with 0.1 γ sensitivity. The optimal duration and frequency of resurveying as well as the detection level of possible tectonomagnetic variations (0.6 γ) have been experimentally determined.

Examples of characteristic local geomagnetic variations possibly associated with changes of tectonic stresses are given. Oscillations with periods of one or a few weeks and amplitudes of 0.7–1.5 γ occur during seismically quiet times, and monotonic variations continuing over a month with subsequent change of sign and a tendency for rapid recovery to the former level occur shortly before energy class K> 11 earthquakes (on the Rautian scale, where K = 1.8M L +4).

Keywords

Fault Zone Epicentral Distance Tectonic Stress Quiet Time Geomagnetic Variation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Center for Academic Publications Japan 1979

Authors and Affiliations

  • Yu. P. Skovorodkin
    • 1
  • L. S. Bezuglaya
    • 1
  • T. V. Guseva
    • 1
  1. 1.Institute of Physics of the EarthAcademy of Sciences U.S.S.R.MoscowU.S.S.R.

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